$Target (TGT.US)$ 's earnings beat sent the stock's historical volatility to this year's high, boosting the appeal of its options to speculators and investors seeking to gain from wild price swings.
Call options that give the holders the right to buy Target shares at $170 by the end of this week saw volume almost quadrupling to 17,630 by 2:30 p.m. Wednesday in New York as the stock climbed near that strike price before paring i...