12 Biggest Mid-Day Losers For Wednesday

Sevcon Inc SEV shares dropped 16.4 percent to $12.10.
CIRCOR International, Inc. CIR shares dipped 11.2 percent to $56.94. Seaport Global Securities downgraded CIRCOR from Neutral to Sell.
Myomo Inc. MYO shares tumbled 9.2 percent to $17.48 after slipping 0.31 percent on Tuesday.
Petrobras Argentina SA ADR PZE shares declined 9.2 percent to $11.93.
Pampa Energia S.A. (ADR) PAM shares dropped 7.8 percent to $58.85.
Chicago Bridge & Iron Company N.V. CBI slipped 6.5 percent to $13.95. CB&I disclosed that it has been awarded contract for ethane cracking furnace project for $40 million. Macquarie lowered its price target on Chicago Bridge & Iron from $11.50 to $10.00.
Earthstone Energy Inc ESTE declined 6.5 percent to $9.64. Seaport downgraded Earthstone Energy to Neutral.
Basic Energy Services, Inc. BAS shares fell 6.3 percent to $22.43. Seaport Global Securities downgraded Basic Energy Services from Buy to Neutral.
Bill Barrett Corporation BBG shares dropped 6.1 percent to $3.10. Seaport Global downgraded Bill Barrett from Hold to Sell.
Superior Energy Services, Inc. SPN fell 4.3 percent to $9.91. Morgan Stanley downgraded Superior Energy from Overweight to Equalweight, while Seaport downgraded the stock to Neutral.
Franks International NV FI dropped 3.8 percent to $7.71. Seaport downgraded Franks to Sell.
Sangamo Therapeutics Inc SGMO declined 3.1 percent to $7.95. Sangamo Therapeutics reported an offering of common shares.