Stocks On the Move: Mattel, Inc., Tenet Healthcare Corp, and Sanchez Energy Corp

U.S. stocks are struggling amid "Brexit" and pre-inauguration Trump headlines. Among specific equities in focus today are Fisher-Price parent Mattel, Inc. (NASDAQ:MAT), hospital operator Tenet Healthcare Corp (NYSE:THC), and oil stock Sanchez Energy Corp (NYSE:SN). Here's a quick look at what's moving MAT, THC, and SN.

• MAT is 5.2% higher at $31.06, after the company named Margaret Georgiadis, formerly Google's president of Americas, its next CEO. Now, the stock is perched above its 100-day trendline -- a consistent level of resistance in recent months -- for the first time since late November. In the options pits, bullish betting has really picked up in recent months. Mattel, Inc. sports a 50-day call/put volume ratio of 4.01 at the International Securities Exchange (ISE), Chicago Board Options Exchange (CBOE), and NASDAQ OMX PHLX (PHLX) -- just 3 percentage points from a 52-week high.

• THC has tacked on 4.3% to trade at $19.01, as hospital stocks rally on President-elect Donald Trump's expressed desire for "insurance for everybody" -- even after the potential repeal of Obamacare. According to brokerage firm Baird, Trump's remark has investors sensing there will be a "softer landing" for the sector than originally anticipated. That said, Tenet Healthcare Corp has still lost more than one-fifth of its value on a year-over-year basis. Not to mention, short sellers have been piling on. Over 19% of THC's float is sold short, which would take nearly seven sessions to cover, at the stock's average trading rate.

• SN has boomed 18.5% to trade at $13.32, and is fresh off an annual high of $13.68. Catalyzing the shares is a raft of bullish brokerage attention, after the energy firm announced on Friday plans to buy Anadarko Petroleum Corporation's (NYSE:APC) Eagleford Shale assets. Specifically, Canaccord Genuity, Northland Capital, and Credit Suisse each raised their price targets on Sanchez Energy Corp. More upbeat analyst notes could be right around the corner, too, as two-thirds of the brokerage firms tracking SN have dubbed it a lukewarm "hold."