News · Equities · MarketWatch · Wed, Sep 16, 2026 9:00 PM

Why optical stocks Lumentum and Coherent were the day’s biggest S&P 500 gainers

OpenBook briefing: Why optical stocks Lumentum and Coherent were the day’s biggest S&P 500 gainers. What it means for equities, FX and crypto traders.

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Why this matters for multi-asset traders

The headline theme is "Why optical stocks Lumentum and Coherent were the day’s biggest S&P 500 gainers". We reframe the story for readers tracking equities, FX majors and crypto liquidity - without copying the original wording.

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Based on reporting from MarketWatch. Read the original.