After two posts about spending, specifically spending for joy, I’m back to my regularly scheduled programming: Save, Invest, Repeat. Today, we talk about stock market ‘averages’. Stocks, also known as equities, are the growth engines of investment portfolios. The S&P 500 is a group of stocks from the 500 largest publicly traded companies in the United States. It includes companies you’ve surely heard of such as Apple, Amazon, Tesla, and Berkshire Hathaway (aka Warren Buffett). It also includes companies you’ve likely never heard of such as Cummins, Inc. a company that makes “diesel, natural gas, electric and hybrid powertrains and powertrain-related components” …