Atlantic Equities downgraded El Paso Corp (NYSE:

) from “neutral” to “underweight.” EP's shares closed at $29.80 yesterday. El Paso's trailing-twelve-month profit margin is 3.22%. Analysts at RW Baird downgraded Thomas & Betts Corp (NYSE:

) from “outperform” to “neutral.” TNB's shares closed at $71.92 yesterday. Thomas & Betts' trailing-twelve-month ROE is 12.39%. Mizuho downgraded MAKO Surgical Corp (NASDAQ:

) from “buy” to “neutral.” MAKO's shares closed at $41.40 yesterday. MAKO Surgical's PEG ratio is -3.91. RBC Capital downgraded SIGA Technologies Inc (NASDAQ:

) from “outperform” to “sector perform.” SIGA's shares closed at $2.98 yesterday. SIGA Technologies' trailing-twelve-month operating margin is -246.60%.