The Fed Lowered Interest Rates, Are they going to buy Bonds?
There have been no such announcements as far as I know. The press release from the Federal Reserve mentions the following implementation details:


Decrease in interest rate on required/excess reserve balances to 1.80 percent
Repo operations for up to an aggregate amount of $75 billion
Decrease in the primary credit rate to 2.50 percent


My guess is that if these efforts do not have enough of an effect, then quantitative easing might resume soon as hinted by Powell:


  "It is certainly possible we will need to resume the organic growth of the balance sheet sooner than we thought," Powell told reporters during a press conference. - CNN