The major US he indices rebounded from yesterday's post Fed declines. The gains were led by the small-cap Russell 2000 which rose by 2.12%. The NASDAQ index rose by 1.91% and the S&P index rose by 1.08%. The Dow was the laggard with a modest rise of 0.14%. US stock exchanges will be closed tomorrow in observance of the Juneteenth holiday. The bond market and banks will also be closed.The gainers list is being led by semiconductors and AI-related technology stocks, with investors continuing to favor companies tied to memory chips, AI infrastructure, and data center spending.Top GainersSanDisk (SNDK): +11.42% to 2,182.45Corning (GLW): +11.16% to 194.97Intel (INTC): +10.64% to 133.99Super Micro Computer (SMCI): +10.33% to 30.65Semiconductor & AI WinnersMicron (MU): +8.70% to 1,133.99Marvell (MRVL): +7.27% to 310.58Taiwan Semiconductor (TSM): +6.96% to 462.22Texas Instruments (TXN): +6.84% to 322.52Ambarella (AMBA): +6.21% to 69.97Qualcomm (QCOM): +6.17% to 226.11Other Notable MoversRoblox (RBLX): +7.28% to 51.52, showing strength in the consumer technology and gaming space.Teladoc (TDOC): +6.32% to 8.07, extending a rebound in digital healthcare shares.Theme of the DayThe rally is heavily concentrated in semiconductors, AI infrastructure, and technology hardware, with 8 of the 12 names on the list directly tied to chip production, chip equipment, networking, memory, or AI servers. The strong gains in Intel, Micron, Marvell, TSMC, Qualcomm, and Super Micro Computer suggest investors are rotating back into the AI and semiconductor trade after recent consolidation.For the trading week, all the indices closed in positive territoryDow industrial average +0.14%. S&P index +1.08%NASDAQ index +1.91%Russell 2000 + 2.12% This article was written by Greg Michalowski at investinglive.com.