BlackRock Says $9 Trillion Cash Acceleration Poses Asset Risk, Multi-Event Week May Amplify Market Volatility

June 16: Rick Rieder, BlackRock’s Global Chief Investment Officer of Fixed Income, stated that following the U.S.-Iran peace deal, roughly $8 trillion to $9 trillion held in money market funds is flowing rapidly back into risk assets—a process he called potentially "explosive." Fueled by this capital influx, U.S. stocks and Treasuries rallied in tandem on Monday, while oil prices pulled back on expectations the Strait of Hormuz would reopen. Rieder noted current liquidity is shifting from low-risk instruments to a broader range of assets, and he anticipates incoming Federal Reserve Chair Kevin Warsh will prioritize balance sheet management and money supply control, rather than relying solely on short-term rate tools. Meantime, the derivatives market is gearing up for a flurry of activity. Due to the June 19 Juneteenth holiday closure, this week’s "triple witching day" has been pushed to Thursday, coinciding with the S&P 500’s quarterly rebalancing and amplifying stock market volatility risks. Additionally, SpaceX-linked options are set to start trading on Tuesday. Market participants believe these contracts could heat up quickly, driven by retail investor funds, potentially triggering a "gamma squeeze" from concentrated call option buying. SpotGamma founder Brent Kochuba warned that with U.S. stocks climbing steadily since April, market makers’ hedging pressures have been building. If Warsh delivers more-than-expected signals at his first press conference, the market will have little resilience to absorb the impact. The S&P 500’s quarterly adjustments will take effect after Thursday’s close: Marvell Technology (MRVL) and Flex (FLEX) will be added to the index, while Pool (POOL) and Campbell Soup (CPB) will be removed.