Today's tickers: ESRX, RPTP, SKX & SLAB ESRX – Express Scripts, Inc. – Sizable bullish bets in long-dated call and put options on the pharmacy benefit management services provider suggest shares in Express Scripts may sky-rocket over the next year and a half. Similar options combination plays were initiated at the end of last week following news Express Scripts agreed to purchase rival Medco Health Solutions Inc. for $29.1 billion in a deal that would make the company the largest U.S. pharmacy benefits manager. Shares in Saint Louis, MO-based Express Scripts slipped 0.60% during the first half of the trading session to $56.95 as of 11:50 am ET. The price of the underlying rallied as much as 12.0% to $57.47 on news of the merger agreement. Large prints in January 2013 contract on Friday appeared to be the work of an investor selling blocks of puts to partially finance the purchase of a bull call spread.