You can try this one at home. Ask any investor you know how to calculate a companyโ€™s market cap and chances are youโ€™ll be met with a blank stare.

A companyโ€™s market cap is its shares outstanding multiplied by its stock price. It amazes me how such an influential calculation is overlooked and not understood. The popular S&P 500 and Nasdaq indices are both market cap weighted yet investors donโ€™t know what that means.

The larger the market cap, the larger the influence a particular stock will have on the direction of the index. The top-10 stocks in the S&P 500 and the Nasdaq have a huge impact on overall returns.

Take a look at the two tables below for the top-10 stocks by market cap for the Nasdaq and S&P 500. The top-10ย stocks comprise 34.7% and 18.7% of the total market cap for their respective indices. Thatโ€™s a huge influence by one group over an index thatโ€™s supposedly diversified.

Itโ€™s incredible how many investors let market cap run the show.

A different approach is to focus on dividends. An even better approach is to look for companies with at least 10-years of dividend increases. We do this with our Retirement Compounders common stock program. Thereโ€™s a certain peace of mind gained from getting cold hard cash from a company even in rough years like this one and 2008, for example.

When I scan the list of names in the top-10 of the S&P 500 and the Nasdaq many of them havenโ€™t even been a public company for ten years, never mind paying a dividend or increasing their dividend.

Donโ€™t let market cap ruin your portfolio. Focus on whatโ€™s important to you. Getting paid a dividend to be invested in this market is a simple calculation everyone can understand.

market cap tables
Click to enlarge.