Following Monday's highs, US stocks experienced a retreat, with the three major indices displaying divergent performances at the close. The Dow Jones Industrial Average saw a slight dip of 0.16%, whereas the Nasdaq Composite surged by 0.86%, and the S&P 500 registered a 0.30% increase. Chip stocks rallied in unison, with the Philadelphia Semiconductor Index soaring by 5.6%. Notably, Intel's shares leaped over 11%, Micron Technology's stock rose by more than 9%, Applied Materials' shares climbed over 8%, ASML's stock gained over 6%, and both SanDisk and AMD witnessed increases exceeding 5%. Optical communication stocks also shone brightly, with Marvell Technology's shares rising over 9%, AAOI's stock surging over 11%, and Astera Labs' shares gaining over 9%. Conversely, Apple's stock closed 1.9% lower, as the market responded tepidly to its latest AI platform and enhanced Siri.