FYI: Chances are, a total stock market index fund could be—and probably should be—the largest part of your portfolio. Indexing the entire market is the favorite strategy of efficient-market theorists, but even adherents of active management generally advocate for a core holding in a broad-market index fund. Expense ratios are the most reliable predictor of future performance, and a total stock market fund can essentially guarantee you won’t trail the market. And with the recent launch of the 0% expense ratio Fidelity ZERO Total Market Index fund, such indexing is now free.
Regards,
Ted
https://www.barrons.com/articles/the-best-way-to-own-the-entire-stock-market-in-just-one-fund-1541793467?refsec=etfs