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Market Analysis9 min read

October 1 Recap: Balanced Tape, MU $3.5B, SPX GEX Negative

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Daily Market Recap on the completed October 1 session printed $17.1B of single-name premium, 60% in calls, with tone balanced at 23% bullish vs 23% bearish. MU led a fifth session running at $3.5B (Bullish). SPX GEX was Negative at −$29.54B while SPY flipped to Positive.

This is a Daily Market Recap readout of the completed October 1, 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 was balanced at 23% bullish vs 23% bearish, with $17.1B of single-name premium and 60% of it in calls. The heaviest name was MU ($3.5B, Bullish) for the fifth session running, its largest premium in that stretch. Index GEX was Negative on SPX at −$29.54B, while SPY flipped to Positive at +$0.84B. That is the finding.

Diagram of the October 1 session: $17.1B single-name tape, balanced 23/23, MU $3.5B, SPX GEX Negative, SPY 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~2026-10-01. Sign-in and an eligible trial or subscription may be required.

What the recap printed

Daily Market Recap header for October 1, 2026, with $17.1B total premium, 60% calls, 40% puts, and 23% bullish vs 23% bearish

Test app, official Daily Market Recap, session 2026-10-01. KPI strip is the session tape. Captured October 1, 2026.

On this run:

  • Session: Oct 1, 2026 (latest completed)
  • Total premium: $17.1B (single-name)
  • Call premium: 60% · put premium: 40%
  • Bullish: 23% · bearish: 23%
  • Tone: balanced
  • Largest sentiment bucket: NEUTRAL $9.2B (bullish $4.0B, bearish $4.0B)
  • Heaviest name: bottom line and glance MU $3.4B; leaders table and headline cards MU $3.5B
  • Bottom-line mover: XRPN +47.2%

The prior session, September 30, printed $14.0B, 67% calls, and leaned bullish 24% vs 22%. This session carried more premium, a lower call share, and no lean. $17.1B is the largest single-name tape in this digest since September 18 ($20.8B).

Neutral premium (spreads, hedges, two-sided prints) is not directional. Tone is the bullish-versus-bearish gap, and here there is none: bullish and bearish both print $4.0B.

Session tone for October 1: Neutral $9.2B, bearish $4.0B, bullish $4.0B

Same run, Step 1. Neutral is more than half the tape. Bullish and bearish are equal. Captured in the test app on October 1, 2026.

Bottom line and the day in one glance for October 1, 2026

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

Glance, one reading per axis:

AxisSymbolReading
Most option premiumMU$3.4B
Largest Net DEXINTC+0M shares-equiv.
Largest Net DEI magnitudeMU157%
Highest IV rankGS69 / 100
Index gamma regimeSPXNegative

The Net DEX row printed INTC +0M at the glance's display precision; quote it as printed and do not read a direction into it.

Leaders: MU $3.5B Bullish

Top names by option premium on October 1, led by MU $3.5B Bullish

Test app, Step 2, session 2026-10-01. Color is net bias on that name, not a forecast. Captured October 1, 2026.

Top of the book:

SymbolPremiumCallPutNet bias
MU$3.5B$2.4B$1.1BBullish
SNDK$811M$514M$297MBullish
TSLA$767M$472M$294MMixed
NVDA$754M$478M$276MMixed
META$518M$363M$155MMixed
AMD$483M$325M$157MBullish

The bottom line and glance print MU at $3.4B; the leaders table and headline cards print $3.5B. Quote both. Either way, MU is more than four times the next name, SNDK ($811M).

Further down the table, two names are almost all puts: LULU ($278M of $283M) and NFLX ($200M of $244M), both tagged Bearish. AAPL, AMZN, and GOOGL are also tagged Bearish.

First recorded window: 09:30, $2.3B. Timing alone does not prove intent.

Largest Net DEI: MU 157%, associated Net DEX Positive. Glance and Step 4 agree. MU leads both premium and DEI this session. 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: GS 69, 30-day IV 34.9%. AMZN (55), GOOG (54), AAPL (53), and INTC (51) follow.

Highest IV rank among active names on October 1, led by GS 69

Same run, 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 72% 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 −$29.54B, SPY Positive

Index GEX backdrop for October 1: SPX −29.54 Negative, QQQ +1.55, SPY +0.84, NDX +0.55 Positive, IWM −0.03 Negative, DIA 0 Positive

Test app, Step 6, session 2026-10-01. GEX is prior-close structure (T+1) under the product dealer-sign convention. Captured October 1, 2026.

IndexNet GEX ($B)Regime
SPX−29.54Negative
QQQ+1.55Positive
SPY+0.84Positive
NDX+0.55Positive
IWM−0.03Negative
DIA0Positive

SPX is more negative than on September 30 (−$17.39B → −$29.54B), its most negative reading in this digest since September 18 (−$63.48B). SPY went the other way, from −$1.44B Negative to +$0.84B Positive. SPX and SPY are separate option books; one Negative and one Positive is not a contradiction. DIA prints 0 with a Positive tag; quote it as printed. 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 $1,098

MU headline cards: last $1,098, $3.5B premium, 69% calls, 19% bullish, 72% average IV

Test app, Step 8, session 2026-10-01. Headline name is the heaviest premium, not the biggest percent mover. Captured October 1, 2026.

MU on this run:

  • Last: $1,098
  • Option premium: $3.5B
  • Call share: 69%
  • Bullish share: 19%
  • Average IV on traded contracts: 72%

Five 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%
Oct 1$3.5BBullish$1,09872%

MU premium rose about 52% from September 30 to the largest reading in the stretch, while average IV on traded MU contracts fell 33 points, from 105% to 72%. The last price is the highest of the five sessions. Bullish share on the cards is 19%, under a Bullish net bias tag. Net bias is not bullish share.

Biggest prints (as the recap listed them):

TimeTypeStrikeExpiryPremiumSentiment
09:59CALL1,2002026-12-18$61MNEUTRAL
11:36PUT1,2002028-01-21$41MNEUTRAL
11:36CALL1,2002028-01-21$18MNEUTRAL
09:59CALL1,5002026-12-18$18MNEUTRAL
09:59CALL1,1502026-10-16$15MNEUTRAL

MU biggest prints on October 1, led by a $61M Neutral 1,200 call for December 18

Same run, Step 8 prints table. Eleven of twelve rows are Neutral. Captured October 1, 2026.

The twelve listed MU prints add up to $209M, about 6% of MU's $3.5B. Eleven are tagged Neutral and one Bearish. Two minutes stand out: at 09:59, three calls (1,200 and 1,500 Dec-18, 1,150 Oct-16) for $94M; at 11:36, three 1,200-strike prints (Jan-2028 put and call, Jan-2027 put) for $70M. The recap lists them as separate prints; it does not say any of them belong together, and the tags do not prove who bought or sold. The largest print is $61M, against $10M on September 30.

Movers: XRPN +47.2%

  • Bottom line: "the day's biggest mover was XRPN, up 47.2%."
  • Step 7 key result (this run): leading mover XRPN, +47.3%, direction Up.

Biggest movers on October 1: XRPN the largest up bar, NKTR the largest down bar

Test app, Step 7, session 2026-10-01. intraday_pct is an in-tape first-to-last underlying-price proxy. Captured October 1, 2026.

The two fields agree on XRPN, one tenth of a point apart in rounding. The bottom line always names the day's largest gain; Step 7's key result can name the largest gain or the largest loss on different runs of the same session, as it did for September 28 and September 29. Here the largest down bar is NKTR. Movers are not intent.

What this session is evidence of

QuestionRecap on Oct 1Clock
How large was the single-name tape?$17.1B, 60% callsSession premium
Did the tape lean?Balanced 23% vs 23%; bullish and bearish both $4.0BSession sentiment
Where did the dollars go?MU $3.5B Bullish (glance $3.4B); SNDK $811M Bullish; TSLA $767M MixedSession leaders
When did premium arrive?First window 09:30 $2.3B30-minute buckets
Largest Net DEI?MU 157%, Net DEX Positive (glance and Step 4 agree)Session DEI
Highest IV rank?GS 69, 30-day IV 34.9%; MU 19T+1 snapshot
What was index GEX?SPX −$29.54B Negative; SPY +$0.84B Positive; QQQ +$1.55BT+1 snapshot
What did MU print?Last $1,098, 69% calls, 19% bullish, avg IV 72%; twelve largest prints $209M, top $61MHeadline name + tape
Biggest mover?Bottom line XRPN +47.2%; Step 7 key this run XRPN +47.3%Two recap fields

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 Oct 1, 2026 (or open market-recap~2026-10-01).
  2. Record the KPI strip: total premium, call/put share, bullish/bearish share, and the Bottom line sentence.
  3. Step 2: confirm MU $3.5B Bullish at the top, note MU is $3.4B in the glance, and find LULU and NFLX near the bottom of the table.
  4. Step 5 and Step 6: confirm GS 69 at the top of IV rank, SPX −29.54 Negative, and SPY +0.84 Positive.
  5. Step 7 and Step 8: write down the bottom line's XRPN +47.2% and Step 7's key for your run, then the MU 09:59 and 11:36 prints.
  6. Stop before "therefore buy MU" or "therefore SPY stays positive GEX."

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