October 21 Recap: SPX GEX Flips to +$46.05B as Five of Six Index Rows Turn Positive10 月 21 日复盘：SPX GEX 翻正至 +$46.05B，六行指数中五行为正

SPX net GEX flipped from −36.72B on October 20 to +46.05B on October 21, and five of six index rows printed Positive; only IWM (+0.97 to −0.04) went the other way. Single-name premium rose after three straight declines, from $12.6B to $14.8B (+17%), and the tone moved from balanced to leaned bullish.

$14.8B, 66% calls, 27% bullish versus 25% bearish. MU led at $1.2B Mixed; five of six index GEX rows were Positive.

Open Daily Market Recap or the October 21 session. Sign-in and a paid entitlement may be required.

This edition's figures in 45 seconds. The numbers match the tables below.

What the recap printed

Test app, session 2026-10-21, KPI. Captured October 30, 2026 (New York time).

Sentiment bars: Neutral $7.1B, Bullish $4.0B, Bearish $3.7B.

Test app, session 2026-10-21, Step 1. Captured October 30, 2026 (New York time).

What changed since October 20

The call share rose six points to 66%, and bullish premium moved two points ahead of bearish. MU's premium and tag were unchanged, but its largest ticket shrank from $20M to $7M.

Leaders: where premium concentrated

Test app, session 2026-10-21, Step 2. Captured October 30, 2026 (New York time).

Three of the top six were Bullish (TSLA, SPCX, META), against one on October 20. META moved from Bearish to Bullish and NVDA from Bearish to Mixed, and SPCX rose from sixth to third. Every top-six name again showed more call than put premium.

Test app, session 2026-10-21, Bottom line / glance. Captured October 30, 2026 (New York time).

Exposure and volatility context

The glance lists NVDA +2M shares-equiv. as largest Net DEX and SPCX 120% as largest Net DEI magnitude. Step 4 pairs SPCX's 120% with a Positive Net DEX sign; on October 20 the leader was MU at 80%.

Step 5's highest IV rank among active names is AMZN 58 / 100, with 40.6% 30-day implied volatility, against AAPL's 62 / 100 and 28.0% on October 20.

Index GEX: SPX flips to +46.05B

Test app, session 2026-10-21, Step 6 · T+1. Captured October 30, 2026 (New York time).

SPX swung 82.77B, from −36.72 to +46.05. NDX (−2.79 to +2.63) and QQQ (−0.66 to +1.64) also turned Positive, and SPY rose from +0.95 to +4.95. IWM was the only Negative row, at −0.04 after +0.97.

Headline name: MU at $908

Test app, session 2026-10-21, Step 8. Captured October 30, 2026 (New York time).

Cards: last $908, premium $1.2B, 63% calls, 25% bullish, 81% average IV on traded contracts. On October 20 the cards read $897, $1.2B, 55% calls, 26% bullish, and 63%.

Test app, session 2026-10-21, Step 8 · prints. Captured October 30, 2026 (New York time).

The largest MU ticket was a $7M 865 call expiring 2026-11-04, tagged Bearish, about a third of October 20's $20M 1,300 put. Three of the six were calls expiring 2027-06-17, two of them at the 800 strike a minute apart.

Movers: BETR +24.1%

Test app, session 2026-10-21, Step 7. Captured October 30, 2026 (New York time).

Bottom line: BETR +24.1%. Step 7: BETR 24.2%, Up. October 20's largest gain was SLS +19.7%.

What this session is evidence of

How to read these numbers

This edition reads TradingFlow's Daily Market Recap for October 21, 2026, captured on October 30 (New York time). Two runs a minute apart printed the same figures. It is a completed-session report, not a trade recommendation.

Two clocks apply. Premium, sentiment, and prints describe the session tape; GEX and IV are the recap's T+1 / prior-close snapshots, not a live intraday gamma map. Neutral premium supplies no direction, and call share is option type, not bullish sentiment. Net DEI is an unsigned magnitude relative to typical activity; Net DEX is a separate signed classification, and a +0M reading rounds to zero. GEX is modeled chain structure under TradingFlow's dealer-sign convention, not observed dealer inventory, a support level, or the next session's direction. Ticket tags do not prove who bought or sold or whether a position opened, and intraday_pct is a first-to-last underlying-price proxy from the option tape, not a verified daily return.

Reproduce the findings

1. Open the October 21 recap; confirm Oct 21, 2026 in the session KPI.
2. Open the October 20 recap beside it and compare the KPI strip, leaders, and all six index GEX rows.
3. Compare MU's leaders-table tag, headline cards, and largest tickets on both days.
4. Read Steps 4–6 separately: exposure magnitude, volatility rank, and index structure.

TradingFlow App Home → Cookbooks → Daily Market Recap → select the completed session.

Related reading

• October 20 recap
• October 19 recap
• Daily Market Recap in Cookbooks
• Option flow · Gamma exposure · IV rank

SPX 净 GEX 从 10 月 20 日的 −36.72B 翻正至 10 月 21 日的 +46.05B，六行指数中有五行为 Positive；只有 IWM（+0.97 至 −0.04）反向转为 Negative。个股权利金在连续三期下降后回升，从 $12.6B 升至 $14.8B（+17%），情绪从 balanced 转为 leaned bullish。

权利金 $14.8B，66% 为 call；看多 27%、看空 25%。MU 以 $1.2B Mixed 居首；六行指数 GEX 中有五行为 Positive。

打开 Daily Market Recap 或 10 月 21 日报告。可能需要登录及付费权限。

45 秒看完本期数据，数字与下文表格一致。

复盘显示了什么

测试应用，交易日 2026-10-21，KPI。采集于 2026 年 10 月 30 日（纽约时间）。

情绪柱：Neutral $7.1B、Bullish $4.0B、Bearish $3.7B。

测试应用，交易日 2026-10-21，Step 1。采集于 2026 年 10 月 30 日（纽约时间）。

与 10 月 20 日相比的变化

Call 占比上升 6 个百分点至 66%，看多权利金领先看空 2 个百分点。MU 的权利金与标签不变，但最大一笔从 $20M 降至 $7M。

活跃榜：权利金集中在哪

测试应用，交易日 2026-10-21，Step 2。采集于 2026 年 10 月 30 日（纽约时间）。

前六名中有三个 Bullish（TSLA、SPCX、META），10 月 20 日只有一个。META 从 Bearish 转为 Bullish，NVDA 从 Bearish 转为 Mixed，SPCX 从第六升至第三。前六名的 call 权利金仍全部高于 put。

测试应用，交易日 2026-10-21，Bottom line / glance。采集于 2026 年 10 月 30 日（纽约时间）。

敞口与波动率背景

速览的最大 Net DEX 为 NVDA +2M shares-equiv.，最大 Net DEI 幅度为 SPCX 120%。步骤 4 中 SPCX 的 120% 对应 Positive Net DEX；10 月 20 日该项居首的是 MU 80%。

步骤 5 的活跃标的最高 IV rank 是 AMZN 58 / 100，30 天隐含波动率 40.6%；10 月 20 日为 AAPL 62 / 100、28.0%。

指数 GEX：SPX 翻正至 +46.05B

测试应用，交易日 2026-10-21，Step 6 · T+1。采集于 2026 年 10 月 30 日（纽约时间）。

SPX 变动 82.77B，从 −36.72 升至 +46.05。NDX（−2.79 至 +2.63）与 QQQ（−0.66 至 +1.64）也转为 Positive，SPY 从 +0.95 升至 +4.95。IWM 是唯一的 Negative 行，从 +0.97 降至 −0.04。

焦点标的：MU 显示 $908

测试应用，交易日 2026-10-21，Step 8。采集于 2026 年 10 月 30 日（纽约时间）。

卡片显示：最新价 $908、权利金 $1.2B、63% calls、25% bullish、成交合约平均 IV 81%。10 月 20 日的卡片为 $897、$1.2B、55% calls、26% bullish、63%。

测试应用，交易日 2026-10-21，Step 8 · prints。采集于 2026 年 10 月 30 日（纽约时间）。

MU 最大一笔为 $7M 的 865 call，2026-11-04 到期，标签 Bearish，约为 10 月 20 日 $20M 1,300 put 的三分之一。前六笔中有三笔为 2027-06-17 到期的 call，其中两笔行权价 800，相隔一分钟成交。

涨跌榜：BETR +24.1%

测试应用，交易日 2026-10-21，Step 7。采集于 2026 年 10 月 30 日（纽约时间）。

Bottom line：BETR +24.1%。步骤 7：BETR 24.2%，Up。10 月 20 日最大涨幅为 SLS +19.7%。

这个交易日证明了什么

如何阅读这些数字

本期读取 TradingFlow 2026 年 10 月 21 日 Daily Market Recap，于 10 月 30 日（纽约时间）采集。相隔约一分钟的两次运行数字一致。这是已完成交易日的报告，不是交易建议。

请分开两个时钟：权利金、情绪与成交记录描述当日成交；GEX 与 IV 是报告的 T+1 / 前收盘快照，不是实时盘中 gamma 地图。中性权利金不提供方向，call 占比是期权类型，不是看多情绪。Net DEI 是相对常态活跃度的无符号幅度；Net DEX 是独立的带符号分类，+0M 读数四舍五入为零。GEX 是 TradingFlow 做市商符号约定下的模型期权链结构，不是已观测的做市商库存、支撑位或下一交易日方向。成交标签不证明谁买谁卖或是否开仓；intraday_pct 是期权成交中标的价格从首笔到末笔的代理变化，不是核验过的日收益率。

复现这些读数

1. 打开 10 月 21 日报告，确认交易日 KPI 为 Oct 21, 2026。
2. 同时打开 10 月 20 日报告，对照 KPI、活跃榜与全部六行指数 GEX。
3. 对照两天 MU 的活跃榜标签、焦点卡片与最大成交。
4. 分开阅读步骤 4–6：敞口幅度、波动率排名与指数结构。

TradingFlow App Home → Cookbooks → Daily Market Recap → 选择已完成交易日。

相关阅读

• 10 月 20 日复盘
• 10 月 19 日复盘
• Cookbooks 中的 Daily Market Recap
• 期权资金流 · Gamma exposure · IV rank