Disappointing results from Walmart sent the markets down to a lower open with the Dow tumbling 95 points to 25,124. Nasdaq fell 30 points to 7209.

On the upside

Qualcomm (Nasdaq: QCOM) increased its offer to buy NXP Semiconductors (Nasdaq: NXPI) from $110 per share to $127.50 per share, or approximately $44 billion.

Noble Energy (NYSE: NBL) reversed year ago losses to post a stronger than expected profit for the fourth quarter.

Mosaic (NYSE: MOS) reported a smaller than expected loss for the fourth quarter.

On the downside

Walmart (NYSE: WMT) disappointed with lower fourth quarter earnings that fell short of expectations.

The Securities and Exchange Commission has issued subpoenas to Ubiquiti Networks (Nasdaq: UBNT) for documents related to its accounting practices, financial information, international trade practices, and auditors.

Citigroup downgraded Snap (NYSE: SNAP) from a Neutral rating to a Sell rating and cut its price target from $18 to $14.

In the broad market, declining issues outpaced advancers by a margin of more than 4 to 3 on the NYSE and by more than 6 to 5 on Nasdaq. The broader S&P 500 fell 10 points to 2,732. Bitcoin leaped $462 to $11,524.