A study by Professor Robert M. Soldofsky and Dale F. Max finds the real return on equities was 1.62% a year from 1910 through 1976; bonds adjusted for inflation returned 1.24% in the same period. The spread between stocks and bonds is much narrower than the Ibbotson-Sinquefield and Fisher-Lorie studies.
https://www.pionline.com/article/19981019/PRINT/810190705/the-way-we-were-1978-79
Ed McQuarrie talks the REAL History of Stocks and Bond performance.
https://www.morningstar.com/portfolios/how-use-commodities-your-portfolio?utm_source=eloqua&utm_medium=email&utm_campaign=FundSpy&utm_content=None_61962&utm_id=32070
How Commodities funds can help diversification with Stocks and Bonds and usually not correlated to either
https://www.morningstar.com/funds/most-stunning-fact-about-vanguards-etf-flows-2
This article shows people are pulling money out of mutual funds and putting it into index funds an example is VOO. Also Vanguard Primecap and Core fund opened the fund due to them both because of money being pulled out. INDEX ETF's way to go tax efficient and low expenses