Markets dive on earnings concerns

Earnings concerns sent the markets into a tailspin with Dow collapsing 195 points to 17,840. Nasdaq crumpled 82 points to 4,941.

On the upside

Bargain hunters lifted shares of Voltari (Nasdaq: VLTC).

Boulevard Acquisition (Nasdaq: BLVD) will buy Dow Chemical's (NYSE: DOW) AgroFresh business in a deal valued at approximately $810 million.

First quarter earnings more than tripled for Atlas Air Worldwide Holdings (Nasdaq: AAWW) to surpass analyst expectations by a wide margin and the company expects significant earnings growth in 2015.

On the downside

First quarter earnings and revenue rose for On Assignment (NYSE: ASGN) but the results missed expectations and the company forecast current quarter earnings and revenue below estimates.

Advaxis (Nasdaq: ADXS) priced its public offering of 2.8 million common shares at the discounted price of $19.00 per share.

ITT Educational Services (NYSE: ESI) announced the retirement of chief financial officer Daniel M. Fitzpatrick. The for-profit educator also reported lower new student enrollment and lower total enrollment.

In the broad market, declining issues outpaced advancers by a margin of nearly 7 to 2 on both the NYSE and on Nasdaq. The broader S&P 500 plunged 21 points to 2085. Bitcoin gained $10 to $237.