Benzinga's Top Pre-Market Losers

MannKind (NASDAQ: MNKD) shares dropped 5.08% to $5.98 in pre-market trading after analysts at Bank of America downgraded the stock from “neutral” to “underperform.”

Smith & Wesson Holding (NASDAQ: SWHC) dipped 4.18% to $11 in the pre-market session after the company issued a downbeat Q2 forecast.

Immunomedics (NASDAQ: IMMU) dipped 3.33% to $6.10 in the pre-market session. Immunomedics's trailing-twelve-month ROE is -35.92%.

Carnival (NYSE: CCL) shares fell 0.47% to $35.77 in the pre-market trading. Carnival shares have dropped 3.00% over the past 52 weeks, while the S&P 500 index has gained 15.10% in the same period.