Rate increase concerns weigh down markets

The nation's employers added 215,000 jobs in July and the unemployment rate held steady at 5.3% but the markets opened lower with the Dow tumbling 85 points to 17,334 over concerns that the Federal Reserve will raise interest rates in September. Nasdaq fell 29 points to 5,026.

On the upside

Aquinox Pharmaceuticals (Nasdaq: AQXP) reported positive results from a Phase 2 LEADERSHIP trial with AQX-1125 in patients with bladder pain syndrome/interstitial cystitis.

Nu Skin Enterprises (NYSE: NUS) reported sharply higher second quarter earnings that topped analyst estimates.

Post Holdings (NYSE: POST) swung to profit for the third quarter as revenue rose.

On the downside

Iconix Brand Group (Nasdaq: ICON) president and chief executive Neil Cole will depart the company in order to pursue other business opportunities.

Fluidigm (Nasdaq: FLDM) widened second quarter losses more than expected and lowered its full year revenue forecast.

Second quarter earnings for NeoPhotonics (NYSE: NPTN) fell short of expectations and the company forecast current quarter results below estimates.

In the broad market, declining issues outpaced advancers by a margin of nearly 5 to 4 on the NYSE and by nearly 3 to 2 on Nasdaq. The broader S&P 500 lost 8 points to 2075. Bitcoin edged up to $276.