Following two consecutive days of sharp swings, U.S. stock market bulls and bears are once again locked in a contest around a key technical level for the S&P 500 (SPY). At the same time, a market breadth indicator tied to volatility that has gained increasing attention is suggesting caution is still warranted for further downside risk.
Data shows that options traders and market makers were actively buying the dip near the 7,500 point level on Friday, but quickly turned to selling once the index rebounded above that price. Open interest data from SpotGamma and Barchart reveals that 7,500 has become a major battleground. According to Barchart, the SPY ETF's call and put options with a $750 strike price hold the largest open interest, indicating significant positions concentrated at that level. Around the $745 strike, both SpotGamma and Barchart assess that market makers' hedging behavior is shifting from a stabilizing mode to a "negative Gamma" state. If the index falls below this threshold, market makers could be forced to sell rather than buy on dips, amplifying volatility and increasing the risk of further declines.
SpotGamma founder Brent Kochuba stated that a break below 7,450 points for the S&P 500 could trigger a more significant sell-off. He also suggested that selling short-term options around the 7,520 strike level holds some appeal.
Beyond the options market, sector rotation divergence within U.S. equities is also a key reason for the recent choppy trading. The persistent strength of AI-related tech stocks, contrasted with relative weakness in some traditional sectors, has left the market heavily reliant on a few heavyweight names. However, the CBOE One-Month Implied Correlation Index, which measures the expected co-movement of the S&P 500's top 50 components, has recently seen a notable uptick. A higher value suggests stocks are moving more in sync. The data shows this index fell to an all-time low of 3.3 on July 10, reflecting a market heavily dependent on a handful of AI leaders for gains. Following the post-Fed meeting market adjustment and subsequent rebound, the index has climbed back to 12 this week, indicating that more sectors are participating in the move and breadth is improving.
It is noteworthy that during Wednesday's S&P 500 decline, only one component stock in the entire index hit a new 52-week low, suggesting that overall selling pressure has not yet become widespread. However, analysts point out that while the Implied Correlation Index has rebounded, it remains below levels seen during the previous two market corrections. In June, the index rose to 20, and in April it reached 45 before the market gradually bottomed out. Therefore, while market breadth has improved, the technical picture is still at a critical juncture. Future direction will depend on whether the S&P 500 can hold the key support level near 7,450 points.
Comments