Harbin Electric (HRBN) is up $1.78 to $20.98 and implied volatility in the options on the stock is falling 34 percent to 96 after the company filed a10K and started mailing proxy metarials for a special meeting for shareholders to vote on the $24 per share cash LBO. 20,000 calls and 26,000 puts traded on the Chinese electrical equipment company so far. The top trade is a 9000-block of Oct 18 puts at $1.40 on ISE and was sold-to-open by a customer, according to ISEE data. 10,485 now traded, probably on the view that the stock will hold above $18 (~14.5%) through the October expiration (21 days). Shares hit a low of $17.63 in volatile trading Wednesday on a negative blog post (see 9/28 color), but have rebounded for a 19 percent gain since that time.