Alliant Tech (ATK) is up $2.04 to $66.04 and options volume is running at 17X the normal levels, as renewed takeover chatter makes the rounds. April 70 calls are the most actives, with more than 3000 traded. The activity seems to lack conviction, however, as only about half of the volume hit ask-side. At 40 percent, implied volatility isn’t much changed either.