The Best Index Funds: Definition, Advantages and Strategies

Choosing the best index funds to buy begins with a solid understanding of how index funds work and the advantages they offer to investors.

Given a basic understanding of index funds, an investor then know how to analyze them and how to select the best ones for their particular investment objectives. It's also important to know why index funds are often better than actively-managed funds.

So, without further ado, let's get to work on learning about index funds.

Index Definition and Example

Even if you are not a beginner, the path to the best index funds begins with the basics. An index, with regard to investing, is a statistical sampling of securities that represent a defined segment of the market. For example, the S&P 500 Index, is a sampling of approximately 500 large-capitalization (aka large-cap) stocks.

There are thousands of large-cap stocks in the universe of investments but the statistical sampling will accurately reflect the price movement of the overall market. Similar to the statistical sampling in polling, it would be difficult and counter-productive to attempt polling the entire segment of a population or, in the case of indexing, to capture an entire segment of a market. Therefore a statistical sampling of only certain securities within a market segment—an index—can accurately represent the entire segment without including all securities within the segment.

So once the index is formed, mutual fund portfolios can be built and made available to investors.

Other than the S&P 500 Index, there are several other major market indexes, such as the Dow Jones Industrial Average, the NASDAQ 100, and the Russell 3000.

Index Fund Definition: How Index Funds Work

Index funds are mutual funds or Exchange-Traded Funds (ETFs) that passively track the performance of the benchmark index. An S&P 500 Index fund would hold the same stocks that are in the index.

There is a science involved with getting just the right exposure to each holding, which can be in the hundreds or thousands, depending upon the index. To create an index fund, the management team will have to decide how much (the number of shares) of each holding on the list to purchase.

The idea is to match the percentage weighting of the index itself. Indexes that rank the holdings so that the larger components are given larger percentage weights are called capitalization-weighted indexes (aka cap-weighted or market cap weighted indexes). The S&P 500 is an example of a cap-weighted index. Most index funds will mirror the cap-weighted index by buying shares of holdings to make the stocks with the largest capitalization the largest holding by percentage in the index fund. For example, the top holdings would be companies like Apple (AAPL), Microsoft (MSFT), Alphabet, (GOOG), and Facebook (FB) because these are the largest stocks as measured by market capitalization.

Advantages of Index Funds

There are four primary reasons why investors buy index funds for their own investment strategies: 1. passive management, 2. low expenses, and 3. broad diversification.

  • Passive Management: Index funds are said to be "passively-managed" because the manager of an index fund is seeking only to buy and hold securities that represent the given index for purposes of matching the performance of the index, not to beat it. In summary, the reason passive management is good for the investor is captured in the saying, "If you can't beat 'em, join 'em."
  • Low Expenses: The index fund manager is not actively researching securities and they are not placing many trades. This translates into low costs, which are a large advantage for index funds because the cost savings translate to higher returns for the investor. For this reason, look for the index funds with the lowest expense ratios. For example, one reason Vanguard has some of the lowest expense ratios for their index funds is because they do very little advertising and they are owned by their shareholders. If an index fund has an expense ratio of 0.12 but a comparable fund has an expense ratio of 0.22, the lower cost index fund has an immediate advantage of 0.10. This only amounts to only 10 cents savings for every $100 invested but every penny counts, especially in the long run, for indexing.
  • Tax Efficiency: Part of keeping costs low is minimizing taxes on investments whenever possible. If investments are held in a taxable account, capital gains and dividends are taxed. Index funds generally have lower capital gains distributions because of their passive nature.
  • Broad Diversification: An investor can capture the returns of a large segment of the market in one index fund. Index funds often invest in hundreds or even thousands of holdings; whereas actively-managed funds sometimes invest in less than 50 holdings. Generally, funds with higher amounts of holdings have lower relative market risk than those with fewer holdings; and index funds typically offer exposure to more securities than their actively-managed counterparts.

Best Mutual Fund Companies for Index Funds

If you want or need to keep your funds at one mutual funds company, the best mutual fund companies for index funds are Vanguard and Fidelity:

  • Vanguard Investments: Home of the "Bogleheads," Vanguard is among the best and favorite of mutual fund companies for the do-it-yourself crowd. Founder Jack C. "Jack" Bogle formed the company around his idea that low-cost index funds can provide superior returns for the long-term investor. Bogle taught that the combination of higher relative costs and the tendency for human error erodes returns for actively managed funds over time. Therefore, it is the common sense approach of low costs and the removal of emotional barriers that makes index funds the best vehicles for investors, especially for those with long-term time horizons (greater than 10 years).

    Vanguard also offers Exchange Traded Funds (ETFs), which have not been completely embraced by Bogle, who has labeled ETFs as a trend potentially dangerous to the average investor.

  • Fidelity Investments: Better known for their actively-managed funds and as a provider of retirement services and products, such as 401(k) plans and IRAs, for businesses and individuals, Fidelity is probably Vanguard's biggest rival with a large selection of low-cost index funds.

The Best S&P 500 Index Funds

The best S&P 500 index funds have a few primary things in common. They keep costs low, they do a good job of matching the index securities (called tracking error), and they use proper weighting methods.

Here are three of the best index funds that track the S&P 500:

  • Vanguard 500 Index (VFINX): More than 35 years ago, Vanguard founder John Bogle observed that the majority of stock investors were unable to outperform the S&P 500 Index consistently over long periods of time. His idea was to simply match the holdings of the index and keep costs low. Simplicity and frugality two of the greatest tenets of successful investing and Vanguard have these virtues mastered.
  • Fidelity Spartan 500 Index (FUSEX): Fidelity's size, experience with indexing and desire to compete with Vanguard combine to make their index fund offerings second only to Vanguard's. Often the index funds between the two giant rivals are indistinguishable in terms of expenses and performance. Ultimately, the competition creates higher quality funds for the investor.
  • Schwab S&P 500 Index(SWPPX): Charles Schwab has made a conscious effort to provide more than just discount brokerage service to investors: They have dipped deeply into the index fund markets of Vanguard and Fidelity. Their index funds are usually a bit higher in expense ratio than their larger competitors but if you are already a Schwab investor, you may as well save the transaction fee for using out-of-network funds and use the Schwab index funds.

Best Total Stock Market Index Funds

A total stock market index fund is a mutual fund that invests in a basket of stocks that will closely mirror the stock holdings and performance of a particular benchmark, such as The Wilshire 5000 or The Russell 3000. The holdings include most of the domestic US stock holdings traded on stock exchanges, which is why the "total market" name is usually included in the fund name. Like S&P 500 Index Funds, the Wilshire 5000 is market-cap weighted, which means that larger companies (those with larger capitalization) will represent a larger portion (be among the top holdings) by percentage than the smaller companies.

  • Vanguard Total Stock Market Index (VTSMX): Vanguard is the original indexer and VTSMX is among the first index funds to capture the total market. With an expense ratio of 0.16 percent, VTSMX makes a solid core holding for any mutual fund portfolio.
  • Schwab Total Stock Market Index (SWTSX): With an expense ratio of 0.09 percent, it's tough to beat SWTSX unless you qualify to get lower expense ratios with one of Vanguard's Admiral Shares funds.
  • iShares Russell 3000 Index Fund (IWV): This is an ETF that works well for those investors who like to the ability to trade intra-day like stocks or if they are able to trade certain ETFs with no transaction fees (some mutual fund companies charge fees for trading certain index funds). IWV has an expense ratio of 0.20 percent.

Best Total Bond Market Index Funds

The total bond market index usually refers to index mutual funds or Exchange Traded Funds (ETFs) that invest in the Barclay's Aggregate Bond Index, also known as the BarCap Aggregate, which is a broad bond index covering most U.S. traded bonds and some foreign bonds traded in the U.S.

Investors can capture the performance of the overall bond market by investing in an index mutual fund or ETF that seeks to replicate the performance of the index. Fund examples include iShares Barclays Capital Aggregate Bond Index (AGG) and Vanguard Total Bond Market Index Fund (VBMFX).

Index Mutual Funds vs ETFs

The index funds vs ETF debate is not really an either/or question. Investors are wise to consider both. Fees and expenses are the enemy of the index investor. Therefore the first consideration when choosing between the two is the expense ratio. Secondly, there may be some investment types that one fund may have an advantage over the other. For example, an investor wanting to buy an index that closely mirrors the price movement of gold will likely achieve their goal best by using the ETF called SPDR Gold Shares (GLD).

ETFs typically have lower expense ratios than index funds. This, can in theory, provide a slight edge in returns over index funds for the investor. However, ETFs can have higher trading costs. For example, let's say you have a brokerage account at Vanguard Investments. If you want to trade an ETF, you will pay a trading fee of around $7.00, whereas a Vanguard index fund tracking the same index can have no transaction fee or commission.

Index funds are mutual funds and ETFs are traded like stocks. What does this mean? For example, let's say you want to buy or sell a mutual fund. The price at which you buy or sell isn't really a price; it's the Net Asset Value (NAV) of the underlying securities, and you will trade at the fund's NAV at end of the trading day. Therefore, if stock prices rise or fall during the day, you have no control over the timing of execution of the trade. For better or worse, you get what you get at the end of the day.

In contrast, ETFs trade intra-day. This can be an advantage if you are able to take advantage of price movements that occur during the day. The key word here is IF. For example, if you believe the market is moving higher during the day and you want to take advantage of that trend, you can buy an ETF early in the trading day and capture its positive movement. On some days the market can move higher or lower by as much as 1.00 percent or more. This presents both risk and opportunity, depending upon your accuracy in predicting the trend.

Part of the trade-able aspect of ETFs is what is called the "spread," which is the difference between the bid and ask price of a security. However, to put it simply, the biggest risk here is with ETFs that are not widely traded, where spreads can be wider and not favorable for individual investors. Therefore look for broadly traded index ETFs, such as iShares Core S&P 500 Index (IVV) and beware of niche areas such as narrowly traded sector funds and country funds.

Final Tips for Buying Index Funds

In general, index funds are best used as core holdings in a diversified portfolio. For example, many investors will use an S&P 500 index fund or total stock market index fund to represent the largest portion (i.e. 30 percent or 40 percent) of the portfolio, with several other funds in diverse categories receiving smaller allocations, such as 10 percent to 20 percent each.

If you are fortunate enough to have high balances in your investment accounts, you may qualify for other share classes that have even lower expense ratios than those funds listed here. For example, Vanguard has another share class, called Admiral Shares that provide lower expense ratios. The Vanguard 500 Index Admiral (VFIAX) has an expense ratio of only 0.05, whereas VFINX has an expense ratio of 0.16 percent.

Disclaimer: The information on this site is provided for discussion purposes only, and should not be misconstrued as investment advice. Under no circumstances does this information represent a recommendation to buy or sell securities.

Learn More About Mutual Funds

best streaming tv app for android bad credit buy a house homes by owners for sale w-4 federal allowances when do you file taxes 2014 how much retirement savings should i have at 50 how can you get rid of fruit flies pounds in a bushel of corn will i get my tax refund best stainless steel cleaner for appliances will i get my tax refund how long can you rent a redbox movie songs from daughter to father harley davidson credit card review what is the powerplay option in powerball how do i get rid of cockroaches where to sale used cell phones california w-4 calculator real estate agent california salary secured credit card how it works homemade fly trap apple cider vinegar taxes taken out of your paycheck how to fill out a w4 form if single easy way to get rid of ants how to get tax extension cost of living comparison world how much does an obgyn make rite aid christmas eve hours how to become a nurse practicioner best way to clean stainless steel appliance free printable baby girl shower invitations bad credit buy a house how to ammend a tax return how many numbers are in the powerball lottery why do you want to be a pharmacist home for sale signs by owner how long does it take to amend a tax return best deals on tires online how to get a business ein number how to become a actor with no experience free credit score no credit card needed what is long term capital gains how fast are tax refunds coming back how long does it take to amend a tax return preschool online learning games for free when can u file 2014 tax return cost of living relocation calculator credit cards for people with low credit scores watch movies free on android mobile who has the best deals on tires capital gains tax stock sale how to build a twin size bed what is the capital gain tax rate personality test to find career best computer jobs without a degree 30-year bond auction who can you claim on taxes natural ways to kill fruit flies cost of living index us cities father daughter songs for wedding songs for mother son wedding dance christian china gross domestic product per capita what does a background check show for a job irs child tax credit calculator how do i start a new facebook account best credit cards no credit history build king size bed frame how to get rid of roaches the natural way credit cards for people with little or no credit how to get green card in usa fica social security tax rate 2013 how many weeks in the year 2015 simple party ideas for adults purpose of w 4 form what is the phone number of the irs birthday party games for 10 year old boys what does a background check show for a job career aptitude test free online for adults how to clean a cast iron grill pan what do employment background checks consist of unsecured credit cards for very bad credit how to apply for green card in usa can you return a redbox movie to any redbox machine credit card to repair credit night jobs for college students what are federal tax allowances websites to make word searches best firewall for windows xp how to clean an iron tax id number for small business listen to audio books free online how to get rid of fleas inside the house party games for 8 year old boys where to sell used phones for cash free audio stories online listen free pdf to word conversion free printable fun math worksheets penalty for early withdrawal ira how many pay weeks in a year 20 dollars an hour salary free email cards to send test to help you decide your career borax and sugar ant killer recipe internal revenue service austin texas phone number retail store cards for bad credit credit card approval with bad credit personality test to find career how do i get rid of cockroaches what does a pre employment background check show how to set up business facebook whats a good down payment on a house best place to buy car tires christmas activities for family gatherings debt to income ratio mortgage calculator burlington coat factory raleigh nc store hours will i get my tax refund weight of a pint of blueberries how to properly clean a cast iron skillet home for sale signs by owner average salary of a dental assistant ice breaker games for parties how to make fruit fly trap easy way to get rid of ants penalties for cashing in 401k what is one ounce of gold worth roth ira distribution code j how to get rid of house ants naturally how long does it take to become a pharmacists free on your birthday atlanta best free malware protection for windows 7 what does apo address mean phoenix restaurants open christmas 2013 free games for pre k grey and yellow baby shower invitations what is a medical doctor do how to ammend a tax return how to clean a stainless steel fridge what is the cap on social security how to use paypal account minnesota capital gains tax rate 2014 average salary of a dental assistant toddler birthday party games outdoor irs phone number california live person credit cards to help build bad credit harley davidson credit card review what should i do for a career test how to win the powerball lottery how to get a chase credit card with bad credit salary jobs without college degree what is m.d. degree what is my capital gains tax rate free thanksgiving activities for kindergarten how do you determine profit margin Internship - Finding an Internship Human Resources Careers State Tax Chart - Income, Sales, Death and Gift Taxes Cover Letter - How to Write a Cover Letter - Entry Level Cover Letter Definition of Estate for Years in Real Estate Army Officer Functional Area Careers First Duty and Future Assignments in the Military Print Advertising - Definition, Costs, and Uses The Carry Trade Explained How Does an Advertising Agency Work? How to Handle the Negative in Your Social Media Channels FICO Score Definition - Credit/Debt Definition Financial Markets - Definition, Types and Function Installation Overview -- U.S. Army Garrison Baumholder Pet Food Sales Representative Career Profile List of Short, Leveraged, Currency Euro ETFs and ETNs Article 94 UCMJ: Mutiny and sedition Sure-Fire Ways to Build Your Referral Business Employee Pay Items Not Required Best Entry Level Sales Jobs Parked Car Insurance - Coverage Information What Is a Freelancer and How Do You Become One? Fair Credit Reporting Act (FCRA) and Employment Last Minute IRA Funding Tips for Those Near Retirement How to Turn Off Sounds in Quicken Army Serious Criminal Misconduct Waivers
How To Buy Series I Savings Bonds for </a>
<a href=Why You Should Follow The Money (And Not Your Passion) Business Insurance for Your Products Brick and Mortar: What does it Mean, Why do we Care? Liability Insurance for Mobile Equipment Budgeting for Baby: How to Avoid New Baby Debt What to Think about that '60 Minutes' Money Laundering Episode Profile of Domino Records - Domino Records Profile Why Should I Budget My Money? Training and Education iPhone, iPad and Android Personal Finance Apps Chart Timeframes - How to Use Different Chart Timeframes How to Create an Automatic Savings Plan What to Wear to Work for a Retail Job The Importance of Scrap Shredding Cashier Interview Questions Gold Price History: Complete History Dutch-Processed Cocoa Powder Substitute Caring for Cast Iron Skillets, Griddles and Cookware Helen Doron Early English and MathRiders Is a PIP the First Step in Firing an Employee? Index of Air Force Bases Listed Online How to Freeze Eggs for Later Use in Cooking Career and Personality Tests to Find the Right Job How to Get an Internship at Seaworld The First 3 Types of Identity Theft Entenmanns - Donuts & Milk Perfect Together Sweepstakes (Expired) Resources for Free PowerPoint Templates What Are 5 Things From Financial Systems That We Need? How to Harvest Rainwater with a Rain Barrel Average Credit Card Debt: U.S. Statistics Free Printable Easter Cards 4 Steps to Creating a Healthy Organizational Culture An Introduction to Polypropylene Recycling Easy Ways to Advertise Your Media Brand Cash Flow, Funding and Financial Management Installation Overview Naval Support Unit Saratoga Springs Kimberly Amadeo Testimonials Grocery Stores That Double Coupons In North Carolina Problems to Avoid When Implementing Your Dress Code 4 Alternatives to Buying Long Term Care Insurance Are the Holidays a Good Time to Start a Business? Active Duty Enlisted Basic Military Pay Charts 2015 Connecticut Tenant's Rights After Landlord Retaliation RRSPs - The Best Income Tax Deduction How Index Funds Minimize Taxes 5 Tips for Building a Successful Online Business Does Your Ecommerce Venture Have Business Vision? QLACs Made Simple Dealing with Creditors When You Can't Pay the Bills How to Get Rid of Dog Pee and Cat Urine Odors Dow Jones Closing History: Top Highs, Lows Since 1929 Income and a Single Premium Immediate Annuity (SPIA) Wholesale Distribution Channels to Help You Get Started Top 10 Movies, TV Shows and Books about Media For Ecommerce, Quality of Earnings Is a Key Metric Business Training - Choosing a Training Solution 3 Reasons Performance Reviews Are Not Successful Tools 200 ok image/jpeg 67454 US Capitol Building seen through fence 4 1 Thumbor/6.0.1 00:00.291 utf-8 Proof of Home Ownership and Car Insurance Discount 6 Things You Might Not Know About Stock Certificates Pros of Listing Rental With a Realtor Switzerland ETFs | List of Swiss Exchange Traded Funds Nervous Wreck? How to Keep Calm at Your Next Modeling Open Call What Does "De Minimis" Mean for Business Taxes? How Does Forex Trading Work and How Can I Get Started? Why Buy a Municipal Bond Fund? Which Franchise is Right for You? Program Review: AVG AntiVirus Free How to Understand Your Current Company Culture Is Bitcoin Mike Tyson's Biggest Battle? Machinist Mate (MM) - Navy Enlisted Rating Description 6 Points in Time When an Employer Needs an Attorney How to Get Rich 10 Reasons Why Employees Loathe Holiday Parties Buying a Home Before Getting Married Pros and Cons of Taking a 401(k) Loan What to Use If You Don't Have Cookie Cutters Business Plan Executive Summary Example Snap by Groupon - Get Cash Back On Groceries How to Search for Tech Jobs on Net-Temps/TopTechJobs How to Write an Organizational Feasibility Study Recycling Industry Event Calendar for 2016 Small Business Loan Application Example What Does NASDAQ Stand For? Then and Now What Are the Risks of Senior Loans? Country and Region Explanation of a Music Demo Tips for Buying Land to Build a New Home Getting Organized for Business Tax Season The Definitive Guide to Business Networking A Lengthy Approval Process Kills Creative Work What Are Market Value Ratios and How Are They Used? Making Money with Kindle Direct Publishing - Getting Started How to Write Requests for RFPs and RFQs Business Idea - How to Start a Crowdfunding Portal in Canada What are the Different Types of Protectionism?

Learn How to Cope With No Sav Employee Wellness in the Workplace 6 Best Places for Free Kids Movies Online How to Reduce Employer Liability at Holiday Parties How to Get a Free Trial of Adobe Photoshop How to Find a Government Internship Frugal Air Freshener Computer Software for Finance How To Successfully Manage Your First Project Radio Frequency Identification (RFID) and SAP The Importance of Scrap Shredding Ordinary Gains (Form 1040 Line 14) What Laws Make Discrimination in Employment Illegal? 5 Ways to Slash Spending Sustainable Business Resources and Advice Difference Between a Tax ID, Employer ID, and ITIN What You Need to Know About Affordable Care Act Tax Penalties What Destination Management Companies (DMCs) Do Seven Fast Facts About Financial Aid Will Old Addresses on Credit Report Hurt Credit Scores? Women In Sports: The Latest Insurance Claims Examiners 5 Planning Decisions Affected By Life Expectancy 29 Cost Saving Sustainability Ideas for Businesses Competitive and Attractive Legal Skills for Job Seekers A Team Building Ice Breaker: 3 Shining Work Moments Religion and the Evolution of Sustainable Investing Sample Letter Requesting a Pay Raise Ways to Improve Your Credit Score and Save Money