Berry Co. (NASDAQ:BRY – Get Free Report) saw a significant drop in short interest in December. As of December 15th, there was short interest totalling 1,340,000 shares, a drop of 13.0% from the November 30th total of 1,540,000 shares. Based on an average daily trading volume, of 1,390,000 shares, the days-to-cover ratio is presently 1.0 days. Approximately 1.8% of the shares of the stock are short sold.

MicroStrategy Incorporated (NASDAQ:MSTR – Get Free Report) gapped up before the market opened on Tuesday . The stock had previously closed at $302.96, but opened at $316.96. MicroStrategy shares last traded at $305.58, with a volume of 4,332,128 shares traded.

Rocket Lab USA, Inc. (NASDAQ:RKLB – Get Free Report) gapped down before the market opened on Monday . The stock had previously closed at $27.22, but opened at $26.22. Rocket Lab USA shares last traded at $25.17, with a volume of 4,480,128 shares.

Shares of KULR Technology Group, Inc. (NYSEAMERICAN:KULR – Get Free Report) fell 13.8% on Tuesday . The company traded as low as $3.30 and last traded at $3.57. 15,752,752 shares were traded during mid-day trading, an increase of 31% from the average session volume of 12,033,972 shares. The stock had previously closed at $4.14.