Marvell’s stock slumps on concerns over custom silicon, but long-term prospects look strong Marvell Technology Inc. could only match Wall Street’s expectations on earnings and revenue as it delivered its latest financial results today, and followed with soft guidance for the current quarter. Predictably, its stock took a nosedive in extended trading, falling more than 11%. The computer server chipmaker reported second-quarter earnings before certain costs such as stock compensation of 67 cents p...