Earnings Plunge For China Nepstar Chain Drugstore By: MarketMinute.com Stock News May 18, 2010 at 17:05 PM EDT China Nepstar Chain Drugstore Ltd. (NYSE: NPD) blamed expenses from 104 store openings for sharply lower first quarter earnings of 2 cents per American Depositary Share from 28 cents per ADS. The stock price tumbled 94 cents to close at $4.74.