Call premium ran 2.7x put premium and the bell closed with option flow paying for upside, not protection.
A tape where the index complex split, healthcare hogged the call book, and one mega-cap dark-pool print dragged a whole theme into focus.
What I noticed today
The first thing that jumped out was the lopsidedness of the option book. Call premium printed $40.11B against put premium of $14.70B — a 2.7:1 skew — and the P/C volume ratio held at 0.60 all session. That on its own is just a number, but the EOD cumulative net call premium closed at +$436.5M, which is the tell I pay attention to. Tape participants weren’t buying downside hedges into the close; they were paying for upside through the bell. Whether that conviction holds tomorrow is a separate question, but the read on today was clean. What stood out next was the sector tape. Healthcare (XLV) ran $69.7M in call premium against $1.2M in puts — a net of +$68.5M that dwarfed every other sector by roughly 5x. That kind of concentration in one defensive sector on an otherwise risk-on tape is unusual and worth flagging. Technology (XLK) was the cleaner directional read at +$12.1M net, with a 6.5:1 call-to-put ratio — no inversions, no hedge layering, just bid. Materials (XLB) showed a 12:1 call ratio on small notional — not a needle-mover by itself, but skew-wise the most lopsided sector in the book. The cracks were in financials and industrials. XLF inverted with $4.4M call against $6.2M put for a net of -$1.8M, and XLI did the same at -$1.7M. Defense was selective today, not broad — the tape didn’t hedge everything, it hedged the cyclicals. Communication services barely registered in either direction. So the picture is risk-on at the index level with pockets of defense in the rate-sensitive and cyclical names, which is consistent with a bull-tilt base read but not a clean melt-up. Single-name premium told a more textured story. NVDA closed +$1.7M call and AMD +$731K, but MU printed -$705K and QQQ -$692K — semis and the Nasdaq complex weren’t moving as a block. The index split was the standout: SPX took +$3.6M while SPY took -$5.2M. That kind of internal complexity — institutional-leaning index bid, retail-leaning index sold — is the sort of thing I tag and watch the next session. And then the dark pool tape: TSLA at $1.38B in mega-print activity, up 305% from yesterday on a session that had been quiet for the name. AMD nearly doubled to $650M. AAPL was quietly accumulated at +11%. SPY ran $3.96B with 25 mega-prints (each ≥100K shares) even though the day-over-day was -25% — the mega-print count is the line I watch on SPY and it stayed elevated. MSFT cooled 50%, GOOGL was exited 53%. The TSLA print is the one I want to see tomorrow: if it sustains, it’s a theme; if it fades, today was a one-day institutional rebalance.By the numbers
- Call premium $40.11B
- Put premium $14.70B
- Call/Put ratio ~2.7:1
- P/C volume 0.60
- EOD net call +$436.5M
- Scenario BASE (BULL TILT)
Cumulative end-of-day net call premium closed at +$436.5M. The tape closed at session highs with steady accumulation rather than a late-day hedge bid.
Sector heatmap
Detail table archived
Descriptive flow narrative only. Detailed strike-level and ticker-level data tables have been archived. Methodology overview at aztmm.com/methodology.
Where premium concentrated
Tech / mega-cap growth
- NVDA+$1.7M
- AMD+$731.4K
- MU-$705.5K
- QQQ-$692.2K
- SMH-$291.1K
Non-tech / index complex
- SPX+$3.6M
- SLV+$994.5K
- SPXW+$882.9K
- STX+$537.9K
- SPY-$5.2M
Top 10 single-trade events
Today’s largest single-trade notable flow events, ranked by total premium. Observational only — what stood out, not a to-do.
Detail table archived
Descriptive flow narrative only. Detailed strike-level and ticker-level data tables have been archived. Methodology overview at aztmm.com/methodology.
Today’s largest single-trade event was an SPX $7,430 call dated 2026-07-17 at $1.94M in premium — a longer-dated upside line that closed near spot. The semi complex (NVDA, AMD, MU) all printed in the top 10 with weekly expirations, mixed call and put.
Sector deep-dive — top 3 tickers per sector
Top 3 names within each sector by aggregate notable-flow premium today. Empty buckets mean no single-name notable flow registered in that sector.
Materials (XLB)
- LAC$87.4K
- FBIN$14.4K
Communication Services (XLC)
- RBLX$84.9K
Energy (XLE)
No notable single-name flow today.
Financials (XLF)
- C$94.5K
- APLD$47.0K
- SOFI$10.8K
Industrials (XLI)
- BA$59.3K
Technology (XLK)
- NVDA$1.32M
- AMD$1.17M
- MU$1.07M
Consumer Staples (XLP)
- GO$88.0K
Real Estate (XLRE)
- FRMI$38.0K
Utilities (XLU)
No notable single-name flow today.
Health Care (XLV)
- UNH$52.0K
Consumer Discretionary (XLY)
- BABA$203.5K
- TSLA$148.6K
- AMZN$117.9K
Aggregate flow leaders — top 15 names
Names that absorbed the most combined options premium across all notable trades today. Observation only.
Detail table archived
Descriptive flow narrative only. Detailed strike-level and ticker-level data tables have been archived. Methodology overview at aztmm.com/methodology.
These 15 names absorbed the most combined notable options premium today. The index complex (SPX, SPXW, QQQ, SPY, IWM) accounts for five of the top nine slots; the semi trio (NVDA, AMD, MU) clusters tightly between roughly $1.07M and $1.32M each.
Cross-cutting flows
Semiconductors aggregate. Combined notable premium across the semi complex came in at $3.73M today. The driver was the NVDA / AMD / MU cluster — each of those three posted over $1M in aggregate notable flow on its own, with smaller secondary prints in WOLF ($173.2K). The complex did not move as one block: NVDA and AMD were call-heavy on the headline trades while MU’s biggest notable was a put. AI / cloud names. Combined notable premium across the AI-and-cloud bucket totaled $18.6K today — effectively quiet. Headline AI names (NBIS, ARM, ORCL, PLTR, SNOW, CRWD) did not produce notable single-trade events that crossed the alert threshold. Inverse / bear ETFs. Combined notable premium across inverse ETFs (SOXS, SQQQ, SPXS, SDOW, etc.) totaled $12.4K today — effectively zero hedge demand at the bear-ETF level. The only notable was SQQQ ($12.4K). Volatility hedges. No notable options activity registered in the volatility complex (UVXY, VXX, VIXY) today — combined notable premium was $0. Consistent with the broader observation that today’s tape did not pay for protection. International / regional ETFs. The international ETF bucket (FXI, KWEB, INDA, EWY, EEM, etc.) registered $90.0K in notable premium today, dominated by EEM ($90.0K). No broad cross-regional rotation pattern in the notable-flow tape.12 Notable data points
Twelve observations from today’s tape — one-line takeaways drawn from the option, dark-pool and sector data above. Notes, not a to-do.
- Call premium printed $40.11B against put premium of $14.70B — a 2.7:1 skew across the full session.
- End-of-day cumulative net call premium closed at +$436.5M — the option tape paid for upside through the bell, not protection.
- Health Care (XLV) net call premium hit +$68.5M — roughly 5x the next-largest sector net and the biggest one-sector concentration in the heatmap today.
- Technology (XLK) posted a 6.5:1 call-to-put ratio on $14.3M of call premium — the cleanest directional sector read after Health Care.
- Financials (XLF) inverted at -$1.8M net and Industrials (XLI) at -$1.7M — defense was selective to cyclicals, not broad.
- Today’s largest single-trade event was an SPX $7,430 call dated 2026-07-17 at $1.94M in premium — a longer-dated upside line that closed near spot.
- Aggregate notable flow on NVDA totaled $1.32M across 5 trades — the top single-name in the notable-flow book.
- AMD $445 call expiring 2026-05-15 printed $466.2K on a 2.5x volume-to-OI ratio — a fresh weekly open at the money.
- MU $785 put expiring 2026-05-15 printed at $370K on a 4.5x volume-to-OI ratio — the largest MU notable was a near-the-money put, not a call.
- TSLA dark pool ran $1.38B with 5 mega-prints (≥100K shares), up 305% from yesterday — the single biggest day-over-day surge in the dark-pool tape.
- SPY dark pool held 25 mega-prints on $3.96B premium despite total premium down -25% day-over-day — the mega-print count is the line, and it stayed elevated.
- Combined semi-complex notable premium reached $3.73M across NVDA, AMD, MU and a smaller tail — the heaviest single-theme concentration in the notable-flow tape today.
Dark pool tell
Detail table archived
Descriptive flow narrative only. Detailed strike-level and ticker-level data tables have been archived. Methodology overview at aztmm.com/methodology.
Why I read it as BASE (BULL TILT)
- Intraday options tape closed net-call positive at +$436.5M — option flow paid for upside through the bell, not protection.
- P/C volume ratio held bullish at 0.60 across the session.
- Technology (XLK) net options premium +$12.1M with a clean 6.5:1 call-to-put ratio.
- Healthcare (XLV) net +$68.5M dwarfed every other sector by roughly 5x — unusual concentration flagged.
- Financials and industrials inverted (net negative) — defense was selective, not broad.
- SPX bid (+$3.6M) while SPY was sold (-$5.2M) — institutional vs retail index complexity.
What I’m watching tomorrow
- TSLA dark pool follow-through. Mega-print activity ran +305% to $1.38B on a session that had been quiet. If tomorrow holds above that band, it’s a theme; if it fades back to the prior baseline, today was a one-day institutional rebalance and nothing more.
- Semi rotation read. AMD dark pool +102% and NVDA option call concentration (+$1.7M) lining up on the same day is the kind of cross-tape confirmation I want to see repeat. MU and SMH were on the other side of the option book today — a second-day continuation would tell me semis is broadening; another mixed print means today was name-specific.
- SPY mega-print count. $3.96B at 25 mega-prints (≥100K shares) is high even though day-over-day premium dropped 25%. Another close above $3.96B with 25+ mega-prints would be the second leg of a broad-market accumulation pattern; a drop below either threshold breaks the read.
- Healthcare (XLV) concentration. +$68.5M net call premium is a one-day outlier I haven’t seen in the recent sector book. If XLV holds tomorrow, it’s a rotation theme worth tracking. If it rotates back to neutral, today was a one-print concentration event and not a sector tilt.