Why Accuray, Cincinnati Bell, and Chesapeake Energy Slumped Today

Friday was mixed on Wall Street, with the Nasdaq Compositeeking out minor gains even as most other major benchmarks finished down modestly. Market participants seemed largely content to see how things played out on the geopolitical front between the U.S. and North Korea, and key reversals in other financial markets helped send 10-year Treasury rates back below 3% and also resulted in a substantial drop in crude oil prices.

Despite generally quiet conditions, bad news sent shares of certain companies lower. Accuray (NASDAQ: ARAY), Cincinnati Bell (NYSE: CBB), and Chesapeake Energy (NYSE: CHK)were among the worst performers on the day. Here's why they did so poorly.