Benzinga's Top #PreMarket Losers

Best Buy Co

shares fell 27.20% to $27.35 in the pre-market trading after the company reported a 0.8% drop in its comparable store sales for the nine weeks ended January 4. Amarin Corporation plc

shares dropped 9.58% to $2.17 in pre-market trading after the company reported that the US Food and Drug Administration delayed decision on Vascepa trial design. MediciNova

dipped 6.69% to $2.51 in the pre-market session after falling 5.28% on Wednesday. CSX

dipped 4.21% to $28.00 after the company reported a 5% drop in its fourth-quarter profit. Analysts at Stifel Nicolaus downgraded CSX from Buy to Hold.