Fortinet Inc (NASDAQ:FTNT) is one of the worst stocks on the Nasdaq Composite (IXIC) today, last seen down 25.9% to trade at $71.61. The cybersecurity giant earlier announced a second-quarter earnings win and matched revenue forecasts, but a dismal fiscal third-quarter outlook is weighing on the shares. The disappointing guidance is also dragging sector peers Crowdstrike Holdings Inc (NASDAQ:CRWD) and SentinelOne Inc (NYSE:S).Digging deeper into FTNT, Morgan Stanley issued a downgrade to "equal-weight" from ...