Analyst Upgrades: Oracle Corporation, Lockheed Martin Corporation, and TASER International, Inc.

Analysts are weighing in on software producer Oracle Corporation (NYSE:ORCL), security and aerospace concern Lockheed Martin Corporation (NYSE:LMT), and electronic weapons manufacturer TASER International, Inc. (NASDAQ:TASR). Here's a quick roundup of today's bullish brokerage notes on ORCL, LMT, and TASR.

• ORCL is down 0.1% at $35.61 this morning, as broad-market headwinds overshadow an upgrade to "buy" from "hold" at Evercore ISI. Oracle Corporation -- which just announced plans to acquire AddThis -- has been slumping since hitting its June high of $45.23, and analysts have been rather divided, with 13 giving the security "buy" ratings, compared to 11 "holds" or worse. Option traders have continued to eye further downside. At the International Securities Exchange (ISE), Chicago Board Options Exchange (CBOE), and NASDAQ OMX PHLX (PHLX), ORCL has a 10-day put/call volume ratio of 1.35 -- higher than 84% of readings from the past year.

• LMT is up 1% at $220.51, thanks to a boost to "outperform" from "sector perform" at RBC. In addition, the analysts upped their price target on the stock to $250 from $220 -- well into record-high territory. Lockheed Martin Corporation had a solid year in 2015, adding 16.3%, and hitting an all-time high of $227.91 in late November. LMT also ended the year on a strong note -- with a new $1 billion aircraft deal for the U.S. military. And the shares could see new highs ahead, should more upgrades occur; seven out of 11 analysts are sitting on ratings of "hold" or worse.

• Another big winner so far today is TASR, up 7.1% at $18.21, on the news that J.P. Morgan Securities upgraded the stock to "overweight" from "neutral," and reiterated a $25 price target -- a 40% premium to today's price. TASER International, Inc. could really use the boost, too. The shares fell more than 55% between their June high and December low last year, and haven't gained back much ground since. Short sellers could be hitting the bricks if the stock continues its rally today. While short interest fell 14.4% during the last two reporting periods, it still accounts for more than one-fifth of the security's total available float, or about seven days of trading, at TASR's typical daily pace.