Here's the Smartest Way to Invest in the S&P 500 in July

Just about any month is a good time to invest in an S&P 500 index fund. Many index funds sport ultra-low fees, too; below are some to consider. After all, while there are several thousand public companies in the U.S. for investors to choose from, the S&P 500 companies make up around 80% of the value of the whole U.S. stock market.