Two rivals of the U.S. Stock Market
The U.S. Treasuries (Maturity-Terms: 2 years and 10 years)
weekly updated charts below
To be sure, what we are talking about here, please check out this wikipedia-link: https://en.wikipedia.org/wiki/United_States_Treasury
...and here the Chart of the "shorter" Brother (2 year "U.S.-Government-Bonds"):