Disappointing earnings news sent the markets into a tailspin during the midday with the Dow collapsing 232 points to 17,445. Nasdaq plummeted 62 points to 4,709.

On the upside

Adam Feuerstein wrote that Advaxis' (Nasdaq: ADXS) market valuation was low compared with its peers.

NF Energy Saving (Nasdaq: NFEC) will supply Gansu Coal Group with 23 sets of flow control equipment.

Bargain hunters lifted shares of Nuverra Environmental Solutions (NYSE: NES).

On the downside

Shares of National Bank of Greece (NYSE: NBG) fell after the anti-austerity Syriza party won general elections in Greece.

STAAR Surgical (Nasdaq: STAA) forecast fourth quarter revenue that fell short of analyst expectations.

Investors locked in profits on Sanmina (Nasdaq: SANM).

In the broad market, declining issues outpaced advancers by a margin of nearly 10 to 9 on the NYSE and by more than 9 to 7 on Nasdaq. The broader S&P 500 tumbled 19 points to 2037. Bitcoin lost $4 to $260.