China Medical Technologies Inc. (CMEDY) posted the biggest two-day drop since April in New York after Stroock & Stroock & Lavan LLP said bondholders of the Beijing- based medical device company filed a petition for liquidation. American depositary receipts of China Medical traded on the U.S. over-the-counter market dropped 8.6 percent to $4.65 in New York yesterday, after tumbling 14 percent on June 15.