[U.S. stock market opens with optical communication sector broadly down, MRVL drops 2.8%, AAOI drops 6.4%] BlockBeats News, July 15, according to BIT ((bit.com)) market data, at the opening of the U.S. stock market, the optical communication sector saw a broad decline. Corning (GLW) fell 3.43%, NOK fell 1.11%, AAOI fell 6.4%, LITE fell 3.2%, and MRVL fell 2.8%.