Here's a link from a NYU Professor https://pages.stern.nyu.edu/~adamodar/New_Home_Page/datafile/histretSP.html
Ed McQuarrie talks the REAL History of Stocks and Bond performance.
https://www.morningstar.com/markets/where-investors-can-find-highest-bond-yields-2025-2
Just an article that talks about bonds and where is current value. I agree with everything but I do not agree with investing in foreign bonds
https://www.morningstar.com/portfolios/experts-forecast-stock-bond-returns-2025-edition
Just an article showing what future returns estimates could be in the future from many firms. They have been wrong the last two years, but we shall see