The best way to play the Federal Reserve’s pivot toward monetary easing is to load up on shorter maturity debt that still provides a 4%-plus yield. That’s the overarching sentiment in the Treasury market as the Fed — with inflation falling — gears up to lower rates and support a soft landing. Meanwhile, a chunk of the nearly $6 trillion parked in money-market mutual funds has new reason to move into Treasury notes as investors fear rates on cash-like investments could soon plunge.