Take a look at some of Wednesday's midday movers:
Morgan Stanley (MS) and Goldman Sachs (GS) fell after Sandler O'Neill cut its fourth-quarter estimates on both banks.
Seagate Technology (STX) rose on renewed rumors the company is a takeover target for private equity.
Flower Foods (FLO) continued to move higher on speculation that it's a strong contender to buy some or all of Hostess Brands.
YY (YY) moved higher in its Wall Street debut. The Chinese social media company priced at $10.50, the low end of its expected range.
St. Jude Medical (STJ) skidded to a 3-1/2 year low after Wells Fargo downgraded the stock to "market perform" and slashed its price target to $36 on concerns about its Durata defibrillator.
Best Buy (BBY) fell after Wall Street analysts cut their price targets and lowered their expectations for a buyout plan by founder and former chairman Richard Schulze.
Sarepta Therapeutics (SRPT) moved higher following bullish comments from Piper Jaffray.
Zipcar (ZIP) gained ground after Avondale upgraded the stock to "market perform" from "underperform."
Vivus and Arena Pharmaceuticals move higher after circulation of a policy bulletin from Aerna that is being interpreted that Aetna will cover the weight reduction medicines.
Tilly's (TLYS) fell after the specialty retailer posted weaker-than-expected quarterly sales and lowered its full-year guidance.
Thoratec (THOR) rose after Wells Fargo upgraded the stock to "outperform" from "market perform."
MIPS Technologies (MIPS) rallied after the chip maker said it receive an unsolicited $75 million buyout proposal from Ceva (CEVA).
(Read More: See CNBC's Market Insider Blog)
-By CNBC's Rich Fisherman.
Questions? Comments? Email us at marketinsider@cnbc.com
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