Looking at historical interest rates, it seems that we are at the end of a long cycle — seventy - six years, in fact. (moneysense.ca)
The average historical interest rate is closer to 4 %. (mscheatsheet.com)
Here's a very long - term graph of historical interest rates using the 10 Year U.S. Treasury (which is used as the main reference rate for most bonds and investments): (awealthofcommonsense.com)