SANTA CLARA, California, August 18, 2026, 10:30 PDT Nvidia stock declined 2.1%, and the chip index dropped 5.4%. The mean price target from analysts suggests an initial valuation of $7.5 trillion. Fiscal Q2 results will be released following market close on August 26. NVIDIA Corporation (NASDAQ:NVDA) slid 2.1% to $220.34 on Tuesday, putting its market…