Optical Communication Stocks Pull Back With Ciena Down 18%; POET Down 8%; Lumentum, COHERENT, Corning Down 6%

Sandisk reports Q4 FY2026 after the close Aug 5, guiding to ~$8B revenue and $30–33 EPS while the Street wants more. With SNDK near $1,438, here’s what to watch.

TradingKey - AMD posted record $11.5B revenue and $1.66 EPS, both beating estimates, yet shares fell ~7% toward $480. Q3 guidance of $13B tops Street. Buy the dip?

TradingKey - On August 5, Japanese and South Korean stock markets were driven higher by the overnight rally in U.S. tech and semiconductor sectors, with major indices in both regions opening higher and trending upward. SK Hynix rose 7%, Samsung Electronics gained over 4%, SoftBank surged 9%, and Kioxia climbed 7%.

TradingKey - Global risk appetite rebounded significantly, with major asset classes strengthening in tandem. Driving factors included the decline in risk premiums following the easing of U.S.-Iran geopolitical tensions, cooling inflation expectations, and the continued strengthening of the AI capita

SpaceX (SPCX) released its fiscal second quarter 2026 financial results on August 4, ET. Following the announcement, SPCX's after-hours share price fell by more than 8% at one point; as of writing, the decline narrowed to 5%, trading at $118.14. During the period, SpaceX's revenue grew 92% year-over