Morning Market Losers

RF Industries RFIL plummeted 28.35% to $6.35 after the company reported preliminary unaudited results for the fourth quarter and issued forecast for the first quarter. ERBA Diagnostics ERB dropped 10.26% to $3.50. ERBA Diagnostics' trailing-twelve-month ROE is -7.74%. Christopher & Banks CBK dropped 9.12% to $7.77. Christopher & Banks shares have jumped 53.50% over the past 52 weeks, while the S&P 500 index has gained 24.92% in the same period. WPCS International WPCS dropped 8.72% to $2.51 after the company reported that it is seeking a buyer for 60% stake in China joint venture.