Reading the market regime before prices move

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FINVIRO RESEARCH

Do gamma walls stop price? What we found in our archive

Every day you read about a "strong level the price will bounce off." Nobody tells you how often it actually bounced. We save the options levels for every stock every 5 minutes since Jul 20, 2026. Then we come back after the close and count what happened. This page shows the result as it is, even when it doesn't favor us.

Last updated: Oct 13, 2026 · recalculated after every trading session

The wall held until the next session's close 83.7% of 19,596 cases
A random line at the same distance would have held 83.3% average of 40 data shuffles
Price broke through the Call Wall During the session 19.4% Random line: 19.8% · 10,235 stock-sessions

Bottom line: the wall held about as often as a random line at the same distance would have (a gap of 0.4 percentage points). So distance explains the holding, not the wall itself.

How did we run the test?

Call Wall (Call Wall) A price above the stock where open call contracts cluster. And the Put Wall A price below the stock where put contracts cluster. Price is said to have a hard time getting past them. We wanted to know: is that true in our data?

  1. Each stock on each day is one case. We don't count many snapshots of the same day many times.
  2. We take both walls from the last snapshot before the close. That is what a trader sees when planning the next day.
  3. We wait for the next session. Did price close below the Call Wall? And above the Put Wall? If yes, we say it “held”.
  4. Then the most important test. A far wall will always hold, because price does not travel far in one day. So we take the stock's move from another day of the same stock and ask: would a line at the same distance have held too? We repeat this 40 times and take the average.
  5. Sources: Levels come from options open interest calculated by the Finviro engine. Prices come from the daily candles of the same stocks.

Distance explains almost all of the holding

A wall less than 1% from price held in only 63.6% of cases. A random line at the same distance would have held in 62.5%. The farther the line, the higher the rate, wall or not.

Wall distance from price Number of cases Wall held Random line
Under 1% 5,240 63.6% 62.5%
1–2% 3,634 81.0% 80.8%
2–3% 2,846 89.5% 89.1%
3–5% 3,609 94.4% 94.1%
5–10% 3,093 97.4% 97.4%
Farther than 10% 1,174 99.5% 99.5%

Case: one stock on one trading day, each wall counted separately. Distance from the close at the last snapshot.

And during the same session?

A second question: we take both walls at the session open and follow the price until the close. Across 10,245 stock-sessions, price broke through the Call Wall in 19.3% and broke below the Put Wall in 21.1%. In 51.3% of sessions, price did not come near either wall.

Using the same test: a random line at the Call Wall's distance would have been broken in 19.8% (the wall: 19.4%). At the Put Wall's distance, in 22.0% (the wall: 21.8%).

The Put Wall break rate here includes sessions where price broke through both walls, so it is slightly higher than the previous number.

Does positive gamma calm the next day's move?

The common view: when price is above the zero-gamma level (Gamma Flip) , market makers calm the move, so it gets smaller. In our archive, the average next-day range (high to low) was 3.1% above it and 2.6% below it. But this comparison mixes calm stocks with volatile ones.

So we compared each stock with itself: its days above the Gamma Flip against its days below it, across 162 stocks. The stock was calmer in positive gamma in only 49.4% of them, and the median difference was 0.00 percentage points. So there is no real difference in the next day's range: the move is neither calmer nor wider.

The study measures the full next-day range, not price moves inside the session minute by minute. That's why we don't show the gamma state as a forecast of move size. We show it as a description of which way market makers hedge.

What does this mean for traders?

  • A wall is a map, not a barrier. It shows where market makers are hedging now. It does not promise that price will stop there.
  • “It will bounce off the wall” is not a plan on its own. The near wall (less than 1%) failed to hold in 36.4% of cases.
  • Distance and volatility set the risk. A stop-loss is built on the stock's normal move, not on the strength of a level.

Limits of this study

  • The period is short. 61 trading sessions from Jul 20, 2026 to Oct 13, 2026. A calmer or rougher market could change the result.
  • Stocks move together. On a broad down day, most stocks fall. So the real sample is smaller than the number of cases.
  • We only measure the close and the breakout. We don't measure whether price slows near the wall and then keeps going.
  • This is an educational study. It is not advice, nor a promise of a future result.

Found an error in a number? Tell us, and we fix it publicly.