U.S. stock futures showed mixed signals in overnight trading Monday as June trading began near record highs. The Dow, S&P 500, and Nasdaq closed May at all-time highs, with the S&P 500 notching a rare nine-week winning streak. Oil prices rose alongside futures as investors continued to push risk assets higher.

Wall Street's rally has been notable for its persistence amid geopolitical headwinds, including ongoing conflicts in Europe and the Middle East. According to Bloomberg, risk appetite in markets has largely shrugged off these concerns, with traders focusing instead on resilient corporate earnings and expectations of eventual Federal Reserve rate cuts.

History suggests the S&P 500's nine-week rally is unusual, according to Yahoo Finance, but the broader trend has been supported by technology stocks and AI-related optimism. Market data shows the S&P 500 has surged approximately 10% from its April lows, though some analysts warn valuations appear stretched.

Looking ahead, investors will scrutinize upcoming economic data, particularly the May jobs report due later this week, for clues on the Fed's next move. A weaker labor market could bolster the case for rate cuts, while stronger data might delay easing.

The counter argument: Some strategists caution that the rally has become overly dependent on a narrow group of mega-cap tech stocks, leaving the market vulnerable to a sharp reversal if sentiment shifts or earnings disappoint.