Bernanke, Ben

 Even with the federal funds rate close to zero, we have a number of ways in which we could act to ease financial conditions further. One option would be to provide more explicit guidance about the period over which the federal funds rate and the balance sheet would remain at their current levels. Another approach would be to initiate more securities purchases or to increase the average maturity of our holdings. The Federal Reserve could also reduce the 25 basis point rate of interest it pays to banks on their reserves, thereby putting downward pressure on short-term rates more generally. Of course, our experience with these policies remains relatively limited, and employing them would entail potential risks and costs. However, prudent planning requires that we evaluate the efficacy of these and other potential alternatives for deploying additional stimulus if conditions warrant.

This largely paralleled Bernanke's comments in his June 22 press conference.  Bernanke dampened expectations of further asset purchases in the short run in his follow-up testimony to the Senate the following day.