The markets turned negative to close modestly lower with the Dow slipping 8 points to 17,492 as crude oil prices edged down. Nasdaq lost 3 points to 4,765.

On the upside

ReneSola (NYSE: SOL) reversed year ago losses to post a profit for the first quarter.

Aqua Metals (Nasdaq: AQMS) will host its first quarter earnings conference call tomorrow morning.

SolarCity (NYSE: SCTY) began testing its new solar power system in Kauai.

On the downside

Valeant Pharmaceuticals (NYSE: VRX) will explore selling noncore assets.

Basic Energy Services (NYSE: BAS) increased the number of shares available for its incentive plan.

Coherus Bioscience (Nasdaq: CHRS) priced its public offering of 3.5 million common shares at the discounted price of $18 per share.

In the broad market, declining issues barely edged out advancers by a slim margin on the NYSE while advancers outpaced decliners by more than 10 to 9 on Nasdaq. The broader S&P 500 lost 4 points to 2,048. Bitcoin gained $4 to $443.