Marvell Technology Group is trading 5% down at $164.84 on November 4, 2026, as investors weigh dilution and integration risks from its $115 billion all-stock Lumentum acquisition. - TD Cowen and Bank of America downgraded the stock and cut price targets over the deal. - The decline contrasts with strong market and semiconductor-sector gains; the cited report identifies no separate new catalyst for this morning’s drop. Trading volume was unavailable in the sources reviewed.