Apple Computer (AAPL) is seeing relative strength and options are actively traded Tuesday morning. While the tech-heavy NASDAQ is down 4.4 points, AAPL shares are up $3.15 to $192.10 and not far from session highs ($192.35). In the options market, some call buyers surfaced amid unsubstantiated talk that a “Tier 1″ firm has positive things to say about Apple. The chatter started making the rounds at about 10:15 and, just then, the top trade of the day hit the tape. It was a block of 3650 Dec 220 calls at 15 cents on ISE, which was an opening customer buyer, according to ISEE data. Dec 190 and 200 calls are now the most actives, with 13,100 and 15,200 traded respectively — mix of buyers and sellers active in both contracts. Implied volatility (average) in Apple is 36.9, from about 38 late yesterday, but significantly above the 52-week lows of 28 set in late October.