Analyst Update: Activision Blizzard, Inc., NVIDIA Corporation, and SINA Corp

U.S. stocks are higher, with the major market indexes extending their quest for record highs. Among specific equities in focus today are video game stock Activision Blizzard, Inc. (NASDAQ:ATVI), semiconductor stock NVIDIA Corporation (NASDAQ:NVDA), and Chinese Internet firm SINA Corp (NASDAQ:SINA). Here's a quick roundup of today's brokerage notes on ATVI, NVDA, and SINA.

• ATVI is down 3.9% at $36.94, after a price-target cut by BMO to $40 from $42. ATVI has been struggling since notching an all-time high on Oct. 25, dropping nearly 19%, with the shares plummeting south of their 200-day moving average to explore post-Brexit territory. Analysts are still optimistic toward Activision Blizzard, Inc., with 11 of 15 rating the shares a "buy" or better, and without a single "sell" on record. More bearish analyst attention could create headwinds to pressure the shares even lower.
  
  
• NVDA is up 0.5% at $93.40, following a price-target hike to $106 from $87 by MKM Partners, which cited NVDA products' "user stickiness" as one of the reasons the firm stands out in the semiconductor field. NVDA has been on a tear in 2016, tacking on over 183% in a series of higher all-time highs, the last of which was tagged last week. Short sellers may be sweating watching NVDA's continued technical strength. NVIDIA Corporation's short interest is up 6.1% over the last reporting period, now accounting for 12.6% of the stock's float, which would take nearly two weeks of trading to cover, at NVDA's average daily rate. A short squeeze could propel the shares even higher.
  
  
• SINA is trading up 10.4% at $74.29, after the company delivered an earnings win last night. Today, Brean Capital reiterated its "buy" rating for SINA, waxing optimistic on Weibo ad growth and saying "from an asset perspective, the company is undervalued." SINA is up 59.9% year-to-date, though the shares are staring up at the formerly supportive $75-$78 region. In the options pits, near-term option players have been especially put-skewed, with SINA Corp's Schaeffer's put/call open interest ratio (SOIR) of 3.43 sitting higher than 99% of all other readings from the past year.