Marvell stock costs a lot -- and it's worth every penny.Semiconductor giant Marvell Technology (MRVL +3.99%) gained 4% through 12:05 p.m. ET Wednesday after eking out small wins on sales and earnings in its fiscal Q3 2026 report last night.Analysts forecast Marvell would earn $0.74 per share, pro forma, on sales of$2.07 billion. Marvell actually earned $0.76 per share on sales of$2.075 billion. Marvell Q3 earningsThat may not sound like much of a beat, but put it in context: Marvell grew sales a powerful ...