) are higher on the session by 1.32%, currently trading at $21.45. The stock has been trading largely higher over the past six months and has been popping higher as of late on takeover speculation. Call volume is heating up on the name once again today. The August $21, $23, and $25 strike calls have each traded over 2,000 times, the August $22 call has traded 7,000 times, and the January 2011 $27 call traded 4,000 times. Call volume is now running at 4x the daily average, though only 45% of all calls traded have been purchases on the offer, which signals that calls have been both sold and purchased. This gives little nod as to direction of the stock. 20,000 calls have traded today versus only 3,000 puts. RadioShack Corporation is engaged in the retail sale of consumer electronics goods and services through the RadioShack store chain and non-RadioShack-branded kiosk operations. The company's stores are located in shopping malls and strip centers, as well as individual storefronts.