The U.S. Securities and Exchange Commission is investigating a January 14 spike in trading in BlackBerry Ltd options that took place hours before Reuters reported that Samsung Electronics Co was in talks to buy the Canadian smartphone maker, according to a person familiar with the investigation. One trade the SEC is looking at took place at 12:06 p.m. on that day, when there was a purchase of options with the rights to buy 200,000 shares of BlackBerry stock at a strike price of $10 a share, the person said.