Options action on Watson Phamaceuticals indicates that traders think it might be a takeover target, according to one options experts.

"This is an interesting stock because it has landed in the cross-hairs of very eager call buyers previously on speculation that it might make an attractive takeover target," said Rebecca Darts of Interactive Brokers said Thursday morning on CNBC's "Squawk Box." "Most recently, we saw this back on July 21, in the wake of Teva's takeover of Barr Pharmaceuticals , but yesterday, with shares in Watson trading flat, we saw call volume hit a 52-week high, sending overall volume to about 14 times the normal volume."