Shares of Altera ALTR are higher on the session by 2.37%, currently trading at $37.16. The stock has been moving largely lower over the past three months and is currently trading below the 50-day moving average. Options traders are focusing on calls today. A short while ago the September 2011 $39.00 call traded 5,000 times on open interest of 5,433 contracts. Calls are outpacing puts today 4 to 1. Altera Corporation is a semiconductor company. Altera designs, manufactures and markets programmable logic devices (PLDs), HardCopy application-specific integrated circuits (ASICs), intellectual property (IP) cores and development software.