Call volume is picking up in Corning (GLW, news, chart). The stock is down 69 cents to $16.36 and touched a new 52-week low following multiple broker downgrades. RBC lowered the stock to Sector Perform, Argus downgraded it to Hold, and UBS lowered estimates following the company’s negative third quarter preannouncement Wednesday. Yet, in the options market, some bullish action has been seen in recent trade, with blocks (4,250, 4,250, 1,795, 1,582, and 1581 contracts) of GLW February 17.5 calls trading offerside for $1.55 and $1.60 a contract. 26,000 GLW calls have traded total, compared to 8,100 puts.