Earnings Live: Marvell Shares Jump After Hours While Costco Stock Slips

On March 5, 2026, Wall Street saw a striking split in stock reactions after key earnings reports. Marvell Technology surprised investors with strong quarterly results, fueled by booming demand for AI and data‑center chips. That sparked a sharp after‑hours jump in MRVL shares as traders cheered better‑than‑expected revenue and optimistic guidance.