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Market Analysis9 min read

September 30 Recap: Leaned Bullish, MU $2.3B, SPX GEX Negative

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Daily Market Recap on the completed September 30 session printed $14.0B of single-name premium, 67% in calls, with tone leaned bullish at 24% bullish vs 22% bearish. MU led a fourth session running at $2.3B, now tagged Bullish. SPX GEX was Negative at −$17.39B while QQQ flipped to Positive.

This is a Daily Market Recap readout of the completed September 30, 2026 session. It is not a trade.

Two clocks sit in the same report:

  1. Session tape — single-name (STOCK) premium, sentiment, timing, and movers from AggregatedOptionTrades.
  2. TradingFlow GEX / IV — prior-close chain and meta snapshots (T+1). They do not recompute live 0DTE books.

The session leaned bullish at 24% bullish vs 22% bearish, with $14.0B of single-name premium and 67% of it in calls. The heaviest name was MU ($2.3B, Bullish) for the fourth session running, its largest premium in that stretch. Index GEX was Negative on SPX at −$17.39B, while QQQ flipped to Positive at +$1.6B. That is the finding.

Diagram of the September 30 session: $14.0B single-name tape, leaned bullish 24/22, MU $2.3B, SPX GEX Negative, QQQ Positive

Tape versus T+1 structure. Sentiment and premium are the session. GEX is prior-close. Neither row is a forecast.

Readers with access can open Daily Market Recap or the dated run market-recap~2026-09-30. Sign-in and an eligible trial or subscription may be required.

What the recap printed

Daily Market Recap header for September 30, 2026, with $14.0B total premium, 67% calls, 33% puts, and 24% bullish vs 22% bearish

Test app, official Daily Market Recap, session 2026-09-30. KPI strip is the session tape. Captured October 1, 2026.

On this run:

  • Session: Sep 30, 2026 (latest completed)
  • Total premium: $14.0B (single-name)
  • Call premium: 67% · put premium: 33%
  • Bullish: 24% · bearish: 22%
  • Tone: leaned bullish
  • Largest sentiment bucket: NEUTRAL $7.5B (bullish $3.4B, bearish $3.1B)
  • Heaviest name: MU $2.3B (glance, leaders table, and headline cards agree)
  • Bottom-line mover: PACB +28.1%

The two prior sessions, September 28 and September 29, both leaned bearish by two points. This session flipped to a two-point bullish lean on slightly less premium ($14.4B → $14.0B) and a higher call share (63% → 67%). The last edition that leaned bullish was September 18.

Neutral premium (spreads, hedges, two-sided prints) is not directional. Tone is the bullish-versus-bearish gap, not the neutral bucket.

Session tone for September 30: Neutral $7.5B, bullish $3.4B, bearish $3.1B

Same run, Step 1. Neutral is more than half the tape. Bullish leads bearish by $0.3B. Captured in the test app on October 1, 2026.

Bottom line and the day in one glance for September 30, 2026

Same recap, Bottom line and glance table. Captured in the test app on October 1, 2026.

Glance, one reading per axis:

AxisSymbolReading
Most option premiumMU$2.3B
Largest Net DEXNVDA+4M shares-equiv.
Largest Net DEI magnitudeTSLA217%
Highest IV rankAAPL57 / 100
Index gamma regimeSPXNegative

Glance and Step 4 agree on the largest Net DEI this time: TSLA 217%, associated Net DEX Positive.

Leaders: MU $2.3B Bullish

Top names by option premium on September 30, led by MU $2.3B Bullish

Test app, Step 2, session 2026-09-30. Color is net bias on that name, not a forecast. Captured October 1, 2026.

Top of the book:

SymbolPremiumCallPutNet bias
MU$2.3B$1.5B$820MBullish
TSLA$856M$521M$335MMixed
NVDA$819M$620M$198MBullish
MSFT$655M$539M$116MBullish
META$654M$492M$162MBearish
SNDK$624M$364M$260MMixed

MU's $2.3B is about 2.7 times the next name, TSLA ($856M). Three of the top five are tagged Bullish; META is the only Bearish tag in the top five, on a mix that is three-quarters calls. Call share is not net bias.

First recorded window: 09:30, $2.1B. Timing alone does not prove intent.

Largest Net DEI: TSLA 217%, associated Net DEX Positive. Largest Net DEX: NVDA +4M shares-equivalent. DEI is unsigned magnitude versus typical volume; DEX is a separate signed classification. Neither proves trader identity or dealer inventory.

Highest IV rank among active names: AAPL 57, 30-day IV 27.2%. AMZN also prints 57; INTC (46) and GOOG (45) follow.

Highest IV rank among active names on September 30, led by AAPL and AMZN at 57

Same recap, Step 5. IV rank places each name's 30-day implied vol within its own past year. Captured in the test app on October 1, 2026.

MU is at 19 on the same chart, while its traded contracts averaged 105% IV (Step 8). IV rank compares a name's 30-day IV with its own past year; average IV on traded contracts is a different field.

Index GEX: SPX Negative −$17.39B, QQQ Positive

Index GEX backdrop for September 30: SPX −17.39 Negative, QQQ +1.6 Positive, SPY −1.44 Negative, NDX +0.69 Positive, IWM −0.5 and DIA −0.06 Negative

Test app, Step 6, session 2026-09-30. GEX is prior-close structure (T+1) under the product dealer-sign convention. Captured October 1, 2026.

IndexNet GEX ($B)Regime
SPX−17.39Negative
QQQ+1.6Positive
SPY−1.44Negative
NDX+0.69Positive
IWM−0.5Negative
DIA−0.06Negative

SPX is more negative than on September 29 (−$14.56B → −$17.39B). QQQ went from −$3.2B Negative to +$1.6B Positive, so two of six indexes are Positive now, both Nasdaq-100 books. NDX is unchanged at +$0.69B. Those are snapshots one session apart, not a measured path. Negative GEX here is modeled structure, not observed dealer inventory. See Negative GEX is session risk, not a trade.

Headline name: MU at $1,069

MU headline cards: last $1,069, $2.3B premium, 65% calls, 22% bullish, 105% average IV

Test app, Step 8, session 2026-09-30. Headline name is the heaviest premium, not the biggest percent mover. Captured October 1, 2026.

MU on this run:

  • Last: $1,069
  • Option premium: $2.3B
  • Call share: 65%
  • Bullish share: 22%
  • Average IV on traded contracts: 105%

Four sessions of MU at the top of the recap:

SessionPremiumNet biasLastAvg IV
Sep 25$1.7BMixed$1,08275%
Sep 28$1.6BBearish$1,05479%
Sep 29$1.7BBearish$1,06593%
Sep 30$2.3BBullish$1,069105%

Average IV on traded MU contracts rose every session, from 75% to 105%. The net bias tag moved from Bearish to Bullish while the bullish share on the cards moved only from 19% to 22%. Net bias is not bullish share.

Biggest prints (as the recap listed them):

TimeTypeStrikeExpiryPremiumSentiment
11:34CALL1,0502026-11-20$10MBULLISH
11:59PUT2,5002028-12-15$9MNEUTRAL
10:34CALL1,0702026-10-02$8MBEARISH
15:58CALL9302027-06-17$7MNEUTRAL
11:24CALL1,0702026-10-02$7MNEUTRAL

MU biggest prints on September 30, led by a $10M Bullish 1,050 call for November 20

Same run, Step 8 prints table. Five of the twelve rows are October 2 calls. The largest print is $10M. Captured October 1, 2026.

The twelve listed MU prints add up to $76M, about 3% of MU's $2.3B. The largest is $10M, against $78M on September 29. The premium was spread across many smaller tickets, not a few large ones. Five of the twelve rows are Oct-2 calls (strikes 970 to 1,070), and the Oct-2 1,070 call shows up twice: $8M Bearish at 10:34 and $7M Neutral at 11:24.

Movers: PACB +28.1%, and a longer bar below zero

Both mover fields printed PACB on every run we captured.

  • Bottom line: "the day's biggest mover was PACB, up 28.1%."
  • Step 7 key result: leading mover PACB, +28.1%, direction Up.

Biggest movers on September 30: PACB the largest up bar, LQDA the longest down bar

Test app, Step 7, session 2026-09-30. intraday_pct is an in-tape first-to-last underlying-price proxy. Captured October 1, 2026.

The bottom line always names the day's largest gain, and Step 7's key result can name either the largest gain or the largest loss on different runs of the same session (September 28 and September 29 both did). Here the chart has a longer bar on the down side: LQDA, and the move-distribution axis starts at −57%. The recap prints no number for LQDA. Quote PACB as the fields say, and look at the chart before calling anything the day's biggest move. Movers are not intent.

What this session is evidence of

QuestionRecap on Sep 30Clock
How large was the single-name tape?$14.0B, 67% callsSession premium
Did the tape lean?Leaned bullish 24% vs 22%; Neutral $7.5BSession sentiment
Where did the dollars go?MU $2.3B Bullish; TSLA $856M Mixed; NVDA $819M BullishSession leaders
When did premium arrive?First window 09:30 $2.1B30-minute buckets
Highest IV rank?AAPL 57 (AMZN also 57), 30-day IV 27.2%; MU 19T+1 snapshot
What was index GEX?SPX −$17.39B Negative; QQQ +$1.6B Positive; NDX +$0.69BT+1 snapshot
What did MU print?Last $1,069, 65% calls, 22% bullish, avg IV 105%; twelve largest prints $76M, top $10MHeadline name + tape
Biggest mover?Both fields PACB +28.1%; longest chart bar LQDA (down, no number printed)Two recap fields + chart

One session is not a trend. Proxies (intraday_pct, simplified GEX) are descriptive estimates, not price forecasts.

Reproduce the findings

  1. Open Daily Market Recap and lock session Sep 30, 2026 (or open market-recap~2026-09-30).
  2. Record the KPI strip: total premium, call/put share, bullish/bearish share, and the Bottom line sentence.
  3. Step 2: confirm MU $2.3B Bullish at the top, and META as the only Bearish tag in the top five.
  4. Step 6: confirm SPX −17.39 Negative, QQQ +1.6 Positive, and NDX +0.69 Positive.
  5. Step 5, Step 7, and Step 8: note AAPL 57 at the top of IV rank, write down PACB +28.1%, note the LQDA bar, then add up the twelve MU prints.
  6. Stop before "therefore buy MU" or "therefore QQQ stays positive GEX."

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