Fed fears risks posed by exit tools; but plan "almost done"

Another tool would have a similar impact but apply more broadly, using overnight repurchase agreements that would let money market funds and other institutions as well as banks essentially make short-term deposits at the Fed.

The worry is that if financial conditions tighten, those large funds of money would flee to the repo facility as a safe haven, depriving the economy of credit and making a potential crisis even worse.