Citadel: Stock Risk-Reward Worsens as Tough September Begins — SkimNews
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- Citadel Securities' Scott Rubner wrote clients Monday that the bullish setup that carried the S&P 500 to records in August is changing, pointing to the earnings calendar, buyback outlook, seasonality, and retail trading patterns as reasons for near-term caution
- September is historically the S&P 500's weakest month, and since 2019 retail net buying on down days has averaged roughly half the typical level, per Citadel's data
- The S&P 500 hit an intraday all-time high of 7,816.70 this month after a nearly 7% rally from the end of July through the first week of August, but has since drifted sideways to lower
- The VIX fell to 14.1 last week — its lowest reading of 2026 — and both single-stock and Nasdaq 100-versus-SPY volatility spreads have compressed to multi-month lows after strong NVIDIA earnings last week
- Corporate buybacks will decelerate as the blackout period for share repurchases accelerates around September 12, Rubner noted
- Cboe head of derivatives market intelligence Mandy Xu said fears over the AI trade have subsided following last week's NVIDIA results, helping crush the volatility risk premium in tech
Why it matters: For investors who rode the August rally to records, the combination of September's historical drag, a retail bid that historically halves on down days, and the September 12 buyback blackout means portfolio hedges now cost less than they have all year — Rubner frames buying protection as cheap insurance rather than a bearish call on the market itself.
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