Senate Republican's plan to delay corporate tax cuts sent the markets tumbling to a sharply lower close with the Dow plunging 101 points to 23,461. Nasdaq dropped 39 points to 6,750.

On the upside

Bristow Group (NYSE: BRS) reported a smaller than expected loss for the second quarter and lifted its full year forecast.

Otonomy (Nasdaq: OTIC) reported upbeat results from its AVERTS-2 Phase 3 clinical trial of OTIVIDEX to treat Meniere's disease.

B. Riley Financial will pay a premium of approximately $143 million to acquire magicJack VocalTec (Nasdaq: CALL)

On the downside

Willbros Group (NYSE: WG) widened losses for the third quarter.

Eastmant Kodak (NYSE: KODK) fell to a loss for the third quarter.

INC Research (Nasdaq: INCR) fell to a third quarter loss.

In the broad market, declining issues outpaced advancers by a margin of more than 5 to 3 on the NYSE and by nearly 3 to 2 on Nasdaq. The broader S&P 500 dropped 9 points to 2,584. Bitcoin crashed $293 to $7,107.