SPY options: $78M premium turnover into 2026-08-11; largest line SPY260811P00773000 $5MSPY 期权异动：期权成交额约 $78M，到期 2026-08-11，最大合约 SPY260811P00773000 约 $5M
Options Flow Snapshot
On August 11, 2026, the SPDR S&P 500 ETF (SPY) saw 567,263 near-term expiring option contracts trade, with total premium turnover of ~$78 million. Put volume hit 310,402 contracts, outpacing call volume at 256,861 for a 0.83 call/put volume ratio. The largest active contract was SPY260811P00773000: an at-the-money (ATM) put option with $773 strike, expiring same day, with 50,707 contracts traded and ~$5 million in premium turnover. The ATM straddle implied price move was 0.3%, with average near-the-money call IV at 24.5% and average put IV at 106.3%, creating an 81.8 percentage point put-call IV skew.
Signal Read-Through
This is a concentrated put option flow paired with extreme downside volatility skew. Higher put volume and elevated put IV relative to call IV indicate market participants were building downside protection positions or betting on a minor SPY pullback during the session.
Fundamental and Event Cross-Check
As the largest tracked S&P 500 ETF, SPY’s option activity typically reflects institutional hedging or broad market sentiment. The extreme IV skew does not align with recent public earnings data (all latest reported earnings are from 2017, no updates), and the May 2026 SEC N-30D and NPORT-P filings show no material changes to SPY’s holdings, so the signal reflects intraday sentiment pricing rather than fundamental fund shifts. The August 11, 2026 market headlines noting the S&P 500 was near all-time highs further align with institutional users hedging against post-record-high pullbacks via SPY options.
Follow-Up Markers
This signal only reflects intraday option pricing expectations, and does not confirm actual downside price action will occur. Next items to watch include whether SPY’s actual next-day price movement matches the 0.3% implied range, and subsequent institutional positioning data for the ETF.
期权成交结构
2026年8月11日，标普500ETF（SPY）的当日到期期权总成交量达567,263张合约，权利金总成交额约7800万美元。其中看跌期权成交量310,402张，看涨期权256,861张，看涨/看跌成交量比为0.83。最大单笔活跃合约为SPY260811P00773000（行权价773美元的当日到期看跌期权），成交量50,707张，权利金成交额约500万美元。当日价平值（ATM）跨式期权隐含波动幅度为0.3%，近价内看涨期权平均隐含波动率（IV）为24.5%，看跌期权平均IV达106.3%，看跌-看涨IV价差达81.8个百分点。
信号含义
该信号属于集中看跌期权成交叠加极端下行波动 skew的市场风险信号。看跌期权成交量占比更高，且看跌IV显著高于看涨IV，表明当日市场参与者更倾向于构建SPY的下行保护头寸，或押注标的资产出现小幅回调。
基本面与事件交叉验证
SPY作为全球规模最大的标普500跟踪ETF，其期权成交多反映机构对冲或主流市场头寸情绪。本次成交的极端IV skew未匹配近期公开财报数据（最近财报数据均为2017年，无更新），且2026年5月的最新SEC申报文件（N-30D和NPORT-P）未显示SPY持仓有重大调整，因此该信号仅反映当日期权市场的情绪定价，而非基本面变化。同时，当日市场新闻提及标普500接近历史高位，进一步呼应了机构通过SPY期权对冲回调风险的可能性。
后续关注
该信号仅反映当日期权市场的定价预期，未证明实际下行压力将兑现。后续需关注SPY次日的实际价格波动是否匹配0.3%的隐含幅度，以及后续机构持仓的调整数据。
This analysis was generated by InvestLog AI based on SEC filings, Form 4 insider transactions, Form 144 planned-sale notices, 13F institutional holdings, analyst ratings, and market data. It is for informational purposes only and does not constitute investment advice.这篇研究由 InvestLog AI 基于 SEC 披露、Form 4 内部人交易、Form 144 计划减持、13F 机构持仓、分析师评级和市场数据生成。内容仅供参考，不构成投资建议。