U.S. equity futures climbed on Tuesday, lifting Nasdaq 100 contracts to a fresh all-time high and bringing the broader market to within striking distance of new records. The underlying Nasdaq 100 index sat roughly 150 points shy of its own peak, while the S&P 500 was less than 1.5% below its January record. In ETF trading, the tech-heavy Invesco QQQ Trust was within US$5 of its high, and the SPDR S&P 500 ETF trailed its own peak by about US$10. Technical analysts pointed to unfilled opening gaps at 600.54 for SPY and 532.17 for QQQ as potential gauges of the rally’s durability; how quickly—or whether—those levels are revisited could help determine the strength of the prevailing uptrend.