Why Adient, CRISPR Therapeutics, and Applied Optoelectronics Slumped Today

Monday was another positive day for the stock market, with major benchmarks seeing small advances to start the week. Most investors focused on Singapore, where U.S. President Donald Trump is expected to meet with North Korean leader Kim Jong Un. Geopolitical issues have weighed on market sentiment for some time, so any sort of favorable resolution to tensions on the nuclear front could be embraced by Wall Street.

Still, some companies had bad news today that held back their shares. Adient (NYSE: ADNT), CRISPR Therapeutics (NASDAQ: CRSP), and Applied Optoelectronics (NASDAQ: AAOI)were among the worst performers on the day. Here's why they did so poorly.