By Chris McKhann, analyst at OptionMonsterLas Vegas Sands ( LVS) is drawing a large block of calls as its shares hover near their 52-week low. OptionMonster's tracking systems show one block of 37,478 calls bought at the June 7.5 strike for 25 cents Monday against open interest of 2,139. The average volume for the last month is 14,953 contracts. Shares of Las Vegas Sands ended Monday's session down nearly 4% at $2.19, just above the low of $2.13 set last Wednesday. This stock was above $80 a year ago and near $60 in August. The shares will need to increase more than 200% for the calls to be profitable at expiration.