Whether one agrees with Chairman Bernanke’s economic philosophy or not, all will admit he is not a stupid man. Only the financial press hinted that there might be some market-moving policy revealed in his testimony yesterday. He revealed exactly nothing, other than that they remain on guard and will use all the tools available to fulfill their mandate. But post-Bernanke buying appeared because, while he was not explicit about doing something, the door is clearly open. Hardly a revelation.