Trade concerns sent the markets down to a lower close with the Dow falling 83 points to 24,664. Nasdaq dropped 57 points to 7238.

On the upside

Applied Optoelectronics (Nasdaq: AAOI) will release first quarter financial on Tuesday, May 8, 2018.

Webster Financial (NYSE: WBS) reported higher first quarter earnings and revenue.

The Food and Drug Administration approved Sientra's (Nasdaq: SIEN) PMA supplemental allowing commercialization of its OPUS-branded breast implant products.

On the downside

Aceto (Nasdaq: ACET) is negotiating for a waiver of its credit agreements and will evaluate its strategic alternatives.

Pier 1 Imports (NYSE: PIR) disappointed with lower fourth quarter earnings and revenue that fell short of expectations and announced that it will no longer pay a quarterly dividend.

Paratek Pharmaceuticals (Nasdaq: PRTK) priced its private offering of $140 million of convertible senior notes.

In the broad market, declining issues outpaced advancers by a margin of more than 2 to 1 on the NYSE and by more than 5 to 3 on Nasdaq. The broader S&P 500 fell 15 points to 2,693. Bitcoin added $22 to $8,219.