US stock futures fluctuated between modest gains and losses on Tuesday as the earnings season began and traders awaited the December CPI report. JPMorgan shares rose about 1.2% in premarket trading after the bank’s earnings and revenue exceeded estimates, while Bank of New York Mellon fell 0.5% as its results failed to impress investors. Delta Air Lines plunged nearly 6% after forecasting adjusted earnings per share of $6.50–$7.50 for the year, below analysts’ estimate of $7.25. Meanwhile, the December CPI report is expected to show a slight uptick in inflation, reinforcing expectations that the Federal Reserve will keep interest rates steady this month. Investors are currently pricing in two quarter-point rate cuts this year, with the first anticipated in June.