The markets closed mixed with the Dow gaining 41 points to 26,252 over concerns about a potential trade war with China. Nasdaq dropped 45 points to 7415.

On the upside

Shares of PagSeguro Digital (NYSE: PAGS) surged in its market debut.

An Amazon (Nasdaq: AMZN) subsidiary will invest up to $600 million in StarTek (NYSE: SRT) for up to 4 million shares.

W.W. Grainger (NYSE: GWW) impressed with sharply higher fourth quarter earnings that beat analyst expectations.

On the downside

Sigma Designs (Nasdaq: SIGM) will sell its Z-Wave business to Silicon Labs then initiate a plan of liquidation.

Teekay (NYSE: TK) priced its public offering of 10 million common shares at the discounted price of $9.75 per share.

Goldman Sachs initiated coverage of Valeant Pharmaceuticals International (NYSE: VRX) with a Sell rating and an $18.00 price target.

In the broad market, advancing issues outpaced decliners by a margin of nearly 4 to 3 on the NYSE and by more than 5 to 3 on Nasdaq. The broader S&P 500 slipped a point to 2,837. Bitcoin soared $189 to $11,239.