Marvell Technology Group is trading 10.15% down at $176.47, with news coverage directly linking the decline to its Lumentum acquisition announcement. - On November 2, 2026, Marvell announced an all-stock agreement to acquire Lumentum for an implied $115 billion; Lumentum shareholders receive 4.5 Marvell shares per share. - Preliminary fiscal Q3 2027 revenue was consistent with prior guidance; midpoint unchanged, with the range narrowed to ±2%. - Broad market indices were higher, offering no clear explanation for the decline.