Benzinga's Top Pre-Market Losers

Cytokinetics (NASDAQ: CYTK ) shares dropped 19.68% to $8.41 in pre-market trading on failed Phase 2 ATOMIC-AHF study. Murphy Oil (NYSE: MUR ) dipped 5.10% to $63.98 in the pre-market session. Murphy Oil completed the spin-off of Murphy USA Inc. Verizon Communications (NYSE: VZ ) dipped 4.50% to $45.25