You can now make more money holding cash than a traditional stock-bond portfolio

• Investors aren't making as much money on the classic 60/40 strategy as holding short-term bonds.
• The mix of US equities and debt yields 5.07%, while yields on the six-month US Treasury hit 5.16% on Tuesday.
• Cash holdings haven't paid out more than the 60/40 portfolio since 2001.

For the first time since 2001, investors can make more money holding cash than a traditional stock-bond portfolio.

On Tuesday, the so-called 60/40 portfolio of US equities and fixed-income assets yielded 5.07%, a figure based on the weighted average earnings yield of the S&P 500, along with the Bloomberg USAgg Index of bonds.