Just spent some time digging into how the major stock indexes actually performed over the last 20 years, and the differences are pretty wild. Most people only look at year-to-year returns, but that's basically useless for understanding what's really going on in the market. There's this old saying from investing legend John Bogle about reversion to the mean - basically, markets always pull back to their historical average eventually, like gravity pulling things down. So I wanted to see what those long-term averages actually look like. The S&P 500 is probably what most people think of when they talk about the stock market. It tracks 500 large companies and basically represents the whole U.S. market - like 80% of all domestic stocks by market cap. Over the past two decades, it returned 345% total, which breaks down to about 7.7% per year. But here's the thing - if you reinvested dividends, you actually got 546% total, or 9.8% annually. That's a pretty solid average nasdaq return last 20 years comparison point. The index is dominated by the mega-cap tech companies: Microsoft at 7.2%, Apple at 6.6%, Alphabet at 3.8%, Nvidia at 3.7%, and Amazon at 3.5%. The Dow Jones is completely different - it's only 30 companies, basically the blue chips that everyone knows. UnitedHealth Group, Microsoft, Goldman Sachs, Home Depot, and Caterpillar make up the top five. The Dow returned 268% over 20 years, which is 6.7% annually. It's way more conservative than the S&P 500, and that shows in the volatility - it moves about 94% as much as the S&P 500 does. Now the Nasdaq Composite is where things get interesting. Over 3,000 companies trade on it, but it's basically a tech-heavy index. Microsoft, Apple, Alphabet, Amazon, and Nvidia dominate here too, but their weightings are way bigger - Microsoft alone is 12.1% of the index. The average nasdaq return last 20 years for the Composite was 687%, compounding to 10.9% annually. That absolutely crushes the other two. The reason is pretty obvious - tech and consumer discretionary stocks have been the best performers for the past two decades, and the Nasdaq is basically betting on those sectors. But there's a trade-off: it's also way more volatile than the S&P 500. The five-year beta is 1.12, meaning it swings harder in both directions. What's interesting is that if you look at the average nasdaq return last 20 years across all three indexes, the broad market (S&P 500) has actually outperformed almost every other asset class you could invest in - European stocks, Asian stocks, bonds, real estate, precious metals, everything. That's why Warren Buffett keeps recommending people just buy an S&P 500 index fund and call it a day. The average nasdaq return last 20 years shows the power of staying invested in quality companies over long periods. Most people chase performance and jump between sectors, but the data pretty clearly shows that doesn't work. Pick your index, reinvest dividends, and let time do the work.