Shares of Targeted Genetics (NASDAQ:TGEN) jumped more than 52% on Monday, ending the trading day at $5.87 a share. Over 7 million shares traded hands, which is 6900% over the 3-month daily average.
What makes this price action so interesting is that there were no news releases or other significant events that could be detected. In fact, in a bizjournals.com article it was noted that company insiders did not know why the shares jumped, or why there was so much interest in the stock.
TGEN 1-yr chart: