Lumentum stock behaves as a high-octane amplifier rather than a calming diversifier, capturing over four times the S&P 500's gains on up days while absorbing more than double its losses on down days over the past year. The optical supplier reported record fiscal Q3 2026 revenue of $808 million, up 90% year over year, but management says its supply of EML laser chips lags demand by more than 30%, with pump lasers and narrow linewidth lasers even more constrained. Over five years, Lumentum returned 60% annualized against 13.1% for the S&P 500, with a correlation of 0.49 and annualized volatility of 62% versus 17.2% for the index. Management guided fiscal Q4 2026 revenue to a range of $960 million to $1.01 billion, noting that supply constraints kept shipments well below customer demand.
