Ben Bernanke received mostly A's for his communication this week in regards to clarifying the Federal Reserve's intentions on the bond-buying situation. Where did he miss the mark? David Wessell points out the Fed chairman's hiccup. 

WESSEL: Does he reveal how much the Fed’s thinking has been influenced by the recent decline in inflation, now well below the Fed’s 2% target?

Grade: B

The pace of inflation is will be an important factor in Fed decision making. “The more subdued the outlook for inflation … the more patient the committee would be” in tightening policy, he said. The Fed will work on “not only avoiding inflation that’s too high but we also want to avoid inflation that’s too low,” he added.