Applied Optoelectronics Inc. shares fell 12.38% to $109.37 in Monday premarket trading after the optical networking company launched a $600 million at-the-market equity offering, raising concerns about dilution. The program, arranged with Raymond James and Needham under a Friday equity distribution agreement filed in a Form 8-K with the Securities and Exchange Commission, permits sales of common stock from time to time and represents about 5.7% of the company's equity value based on Friday's close. AAOI has gained 412.82% over the past 12 months, leaving it vulnerable to sharp pullbacks as investors reduce exposure to high-momentum stocks. The shares are 9.7% below their 20-day simple moving average and 15.1% below their 50-day average, but remain 12.4% above the 200-day average. The relative strength index is 48.89, indicating neutral momentum, while the moving-average structure shows weaker short-term momentum but a still-bullish longer-term alignment. Traders may watch the prior July breakdown area, with resistance at $128.50 and support at $91.50. AAOI is held by several ETFs, including PTF, STXK and XITK, whose flows can add buying or selling pressure.