The S&P 500 has remained remarkably resilient in the face of mounting macro headwinds, continuing to hover near record levels despite significant challenges. Since the July 28 low, the index has gained around 5% and returned to record highs, but breadth has moved in the opposite direction. The percentage of constituents trading above their 200-day moving average has declined from 73% to 51%, a notable deterioration in participation during a period when the index itself has been making new highs. This represents a dramatic shift from the 2007 through 2020 period when the two indexes moved together almost perfectly through the financial crisis and COVID crash. The current rally has become increasingly dependent on a handful of mega-cap companies, with only about half of its members trading above their 200-day moving averages, down from roughly 70% in midsummer.
The MOVE Index has climbed from around 80 on Tuesday to 104 on Thursday, its highest level since March when it hit 199, according to CoinDesk data. This surge in bond market volatility is being driven by rising energy prices and bond yields adding to inflation concerns, with the U.S. 10-year Treasury yield climbing for 6 straight weeks as the bond rout deepens, with yields briefly hitting 5.2% before easing to 5.163%. The war in the Middle East has driven oil and diesel prices higher, topping $100 per barrel, complicating the inflation outlook and raising questions about how much further central banks may need to tighten policy. When MOVE was last around this level in March, the S&P 500 stood near 6,350, but it has since risen to 7,704, up roughly 21%, though bond traders are now paying considerably more for protection against swings in interest rates.
Much of the S&P 500's resilience can be attributed to the resurgence of mega-cap stocks, after significant underperformance in the first quarter. The Magnificent Seven Index, comprised of Alphabet (NASDAQ:GOOGL), Amazon (NASDAQ:AMZN), Apple (NASDAQ:AAPL), Meta (NASDAQ:META), Microsoft (NASDAQ:MSFT), NVIDIA (NASDAQ:NVDA), and Tesla (NASDAQ:TSLA), has staged an impressive comeback, powering the index back to record-high territory and reclaiming leadership relative to the broader market. However, this concentration creates vulnerability, as the average constituent remains more than 19% away from its own 52-week high, with the average technology stock remaining nearly 22% below its own 52-week high despite the sector being less than 1% from a new 52-week high. The Nasdaq Composite gained 0.45% to a second consecutive record close, while the Dow fell 0.36%, with S&P 500 and Nasdaq futures steady Wednesday morning.
The S&P 500 and the equal-weight ETF have diverged significantly, with correlation dropping to about 0.47, the lowest reading in nearly two decades, according to Investing.com India analysis. This represents a dramatic shift from the 2007 through 2020 period when the two indexes moved together almost perfectly through the financial crisis and COVID crash. The divergence has been building since 2021, with dips in mid-2021, early 2023, and early 2025 never falling much past 0.6, and none of them were resolved by the equal-weight index catching up. Each time the gap closed because the cap-weighted index came back down to meet it, but this time the equal-weight index is failing to recover, suggesting the divergence is getting extreme. The S&P 500 is trading near record highs but faces significant internal weakness, with only about half of its members trading above their 200-day moving averages.
The lack of participation is also evident in new-high data, with while the S&P 500 sits around 1% below a record high, the average constituent remains more than 19% away from its own 52-week high. This disparity underscores the growing gap between headline performance and underlying market strength. Historical comparisons suggest instances where the S&P 500 has traded near record highs despite weakening participation have generally been followed by positive returns, but the magnitude of those gains has tended to be below average. Filtering for periods when the S&P 500 was within 3% of a 52-week high, fewer than 55% of constituents were trading above their 200-day moving average, with following those signals, the S&P 500 delivered average returns of 0.4%, 1.7%, 3.8%, and 6.3% over the subsequent one-, three-, six-, and 12-month periods, respectively. While those forward returns remained positive on average, the frequency of positive outcomes was notably lower than the S&P 500's typical success rate across comparable rolling periods.
