Reading the market regime before prices move
Reading the market regime before prices move
Every number here is computed from the traded CAT options chain. The call wall is where dealer hedging accumulates above spot and caps upside, the put wall is its mirror below, and the gamma flip is the level where hedging stops damping moves and starts amplifying them.
| Strike | Calls | Puts | Today's volume | Skew |
|---|---|---|---|---|
| 797.50 | 8 | 8 | 34 | Neutral |
| 800.00 | 1,604 | 1,710 | 826 | Put |
| 805.00 | 532 | 159 | 295 | Call |
| 810.00 | 698 | 873 | 341 | Put |
| 812.50 | 18 | 2 | 42 | Call |
| 815.00 | 306 | 138 | 260 | Call |
| 817.50 | 6 | 0 | 64 | Call |
| 820.00 | 818 | 933 | 354 | Put |
| 822.50 | 5 | 0 | 11 | Call |
| 825.00 | 164 | 150 | 102 | Call |
| 827.50 | 9 | 0 | 12 | Call |
| 830.00 | 1,330 | 434 | 288 | Call |
| Day | Price | Gamma flip | Call wall | Put wall |
|---|---|---|---|---|
| 2026-08-10 | 839.28 | 846.95 | 850.00 | 800.00 |
| 2026-08-11 | 845.04 | 842.06 | 860.00 | 800.00 |
| 2026-08-12 | 858.24 | 846.29 | 860.00 | 800.00 |
| Metric | Value |
|---|---|
| Max pain strike | 820.00 |
| Put/Call ratio · today's volume | 2.22 |
| Put/Call ratio · open interest | 1.35 |
| 0DTE gamma flip | 799.68 |
| 0DTE contracts in chain | 298 |
| Total contracts read | 1,484 |
Price 813.94 is under the gamma flip 819.53 by 0.68%. Positioning is negative: dealer hedging runs **with** the move rather than against it, so jumps become wider and reversals sharper. Sessions in this state move more than the size of the news would suggest. Price is inside the range between 790.00 and 850.00, closer to Put wall of the two.
أكبرُ تجمّعٍ لعقود الشراء عند 850.00 (4.43% from price)، ولعقود البيع عند 790.00 (-2.94% from price)، والمسافةُ بينهما 7.59٪، a **wide** range. That does not imply a move is coming, only that the walls are far enough apart not to confine CAT during the session, so flow leads rather than hedging.
صافي تعرّض الغاما لـCAT يبلغ −14.98 مليون، وهو حجمٌ محدود. Hedging for a 1% move is about 18,405 shares. In this range hedging stays secondary to the stock's own flow, so the levels below should not be asked to carry more than they can.
and this reading is built on 1,484 contracts in the chain.
Over the last 27 days of tracking (298 archived snapshots), CAT stayed above the gamma flip in 27% of readings، وتنقّلت نقطةُ الانقلاب نفسُها بين 802.03 و871.66، أي بنطاق 8.68٪، وهو ما يعني أنّ the level moves with the market and does not serve as a fixed reference across days، and net exposure today is below the period average (−25.07 مليون).
