While it is unknown if this is merely a bull trap to get yet another bubble going, then to slaughter everyone with the same relentless barrage of margin hikes as we saw in the spring of 2011 [5], or simply volumes in commodities have gotten so low that even the CME is willing to allow a little price appreciation in exchange for participation is unknown, but as of April 16 silver initial and maintenance margins will be 12.5% lower, while copper margins are declining by 20%.
For the full list of margin changes among electricity, agri, coal, crude, freight, metals, nat gas, and refineds, see here [7].

