I think you must mean you bought the SINA 67.5 calls at 2.6; that is very possible. By the close you were up about 140% with a last price of 6.21. Actually the bid (the selling price) was about 6.05, so you were really only up about 130%.
sina67.5 calls expiration 01/27/2012 sina 65 calls expiration 01/27/2012 before 13:30 PM ET, sina67.5 call quote was x 0.01 (no bid), actually I bought 2 contracts at 0.31 thursday, iniiatially think about buying 65 call, the breakout will most likely happen, but it was expensive over 1bucks (I hate to buy too close to the market or sell), and plan to buy in the morning for breakout play, I see no bid, just ask at 0.01, sina hovered around 62~63, hardly break up 63,I look at the 65 call, it is around 0.06 under, so i started to buy 65 call first, not much risk 100lots. then I think it may break up 67.5 and may hit 70+, so I bought 100lot 67.5 with almost no cost. this kind of trades are plenty, particularly in Friday, Option experiation day. I bought 50 lots AMZN 200 calls that day too (think about 200 breakup,but never happens), lost , expired worthless.