Quarterly results from Micron Technology Inc MU.O and Walgreens Boots Alliance WBA.O are also slated for this week. By Krystal Hu and Medha Singh June 28 (Reuters) - The Nasdaq and S&P 500 hit all-time highs on Monday, fueled by tech stocks as investors expect a robust earnings season while interest rates remain low. the tech-heavy Nasdaq's 5% gain in June is outpacing its peers as investors pile back in to tech-oriented growth stocks on diminishing worries about runaway inflation.