In a day in which silver was pounded the most since September 2013 without any fundamental reason to explain this weakness (aside for the extensively discussed Precious Metals-USDJPY funding pair trade, so favored by the central banks to punish gold/silver while pushing risk higher), many are wondering: what was the reason for this crash? Well, in a day in which Yellen now openly advised Democrats in a non-public setting about Fed policy, is it that ludicrous to assume that someone leaked the following announcement made after the close by the CME, namely that silver margins were just hiked by 11%?