Exchange Traded Funds

https://www.investor.gov/introduction-investing/basics/investment-products/exchange-traded-funds-etfs
https://www.investopedia.com/terms/j/john_bogle.asp
https://www.investopedia.com/terms/e/etf.asp
https://en.wikipedia.org/wiki/Exchange-traded_fund
https://en.wikipedia.org/wiki/John_C._Bogle
https://www.investopedia.com/articles/exchangetradedfunds/12/brief-history-exchange-traded-funds.asp
https://en.wikipedia.org/wiki/Warren_Buffett
https://www.investopedia.com/articles/investing/030916/buffetts-bet-hedge-funds-year-eight-brka-brkb.asp
https://money.cnn.com/2018/02/24/investing/warren-buffett-annual-letter-hedge-fund-bet/index.html
https://www.cnn.com/2019/02/25/investing/warren-buffett-sp-500-stocks/index.html
https://builtin.com/artificial-intelligence/ai-trading-stock-market-tech
https://investor.vanguard.com/index-funds/what-is-an-index-fund
https://www.nerdwallet.com/blog/investing/how-to-invest-in-index-funds/
https://www.investopedia.com/ask/answers/032715/when-expense-ratio-considered-high-and-when-it-considered-low.asp
https://www.investopedia.com/ask/answers/042415/what-average-annual-return-sp-500.asp
https://www.begintoinvest.com/expense-ratio-calculator/
https://www.investopedia.com/terms/a/assetclasses.asp
https://www.investopedia.com/terms/m/marketexposure.asp
https://www.usatoday.com/videos/money/2019/01/17/vanguard-founder-john-bogle-dies-89/2599179002/