NEW YORK, June 19 : Investors are seeking signs that the U.S. stock market rally fueled by artificial intelligence has more life left in it, and the upcoming Micron Technology earnings will check the pulse of chip demand to see if it is still accelerating. Despite a sharp mid-week selloff, major U.S. stock indexes are hovering near all-time highs, supported by robust corporate earnings driven by an AI investment boom and relief from the Iran war. Micron's shares are up 298 per cent this year,