---
title: "Get Gamma Regime Series"
method: GET
path: "/api/gex/regime-series"
tags: ["GEX"]
---

# Get Gamma Regime Series

`GET /api/gex/regime-series`

## Request

- Base URL: `https://api.zerogex.io` (the document declares no server; this is the origin it was published from)
- URL: `https://api.zerogex.io/api/gex/regime-series`
- Auth: HTTP bearer

The Gamma Shift read at every 5-minute bar of a session.

Where ``/api/gex/regime-shift`` answers "how did dealer gamma change
between these two moments" as a single card, this is the same maths as a
line — so structure can sit on the same timeline as
``/api/flow/hedging`` and be read against it. Flow says how hard the tape
is pushing; this says whether the book absorbs or amplifies it.

Two lenses per bar. ``anchored_*`` is versus the session's first bar
("changed today"), the counterpart of the flow panel's cumulative curve.
``rolling_*`` is versus ``rolling_bars`` bars back ("changing right now"),
the counterpart of the rate line and the one to read beside a flip. They
do not sum: both weight strikes by proximity to each bar's OWN spot, so
the kernel re-centres every bar.

Positive ``stability`` means more long gamma near spot — dealers hedge
against moves, so the tape pins. Negative means the book has turned
accelerant. Positive ``lean`` means the change is supportive; negative
means capping.

Scores are RAW dollar-GEX; normalising against a trailing distribution of
sessions is ``/api/gex/regime-history``'s job.

Served from a table the Analytics Engine materialises one bar at a time.
Computing it on read would mean diffing two ~1500-row chains per bar per
viewer per poll — the shape that took the strike-profile timeseries down
in Aug 2026 — so a miss returns empty rather than falling back to compute.

Each bar also carries the spot-to-flip cushion: how much room price has
before the gamma regime itself changes. The flip level and the typical
30-minute move are stored; distance, direction, the rolling rate and the
SECURE / NORMAL / THIN / CROSSING label are derived here, so retuning a
threshold reclassifies history instead of leaving old bars labelled by a
rule that is no longer live. The label is never computed from raw points,
because ten points is a crossing risk on SPX and a comfortable cushion on
SPY: it grades the cushion against the typical 30-minute realized move
(``cushion_basis='move_30m'``), and falls back to a fraction of spot, which
has no NORMAL band, only where no move was stored (``'spot_fraction'``).
``cushion_state`` of ``NO_FLIP`` means the gamma profile had no zero
crossing at all, which is a different statement from a distant one.

Same session resolution as ``/api/flow/hedging``, so the two cover
identical bars. Rows newest → oldest. Unknown symbols 404; a session with
nothing written yet returns an empty ``bars`` list.

## Query parameters

- `symbol` string, required
- `session` 'current' | 'prior'
- `date` string, nullable: An explicit ET trading day, YYYY-MM-DD. Overrides `session`. gamma_regime_5min has been written per bar since this panel shipped and is retention-exempt, so any stored session answers. A day with nothing written returns 200 with an empty `bars` list -- never 404.
- `intervals` integer, nullable: If provided, return only the last N 5-minute bars (tail window).

## Response `200`

Successful Response

- GammaRegimeSeriesResponse: Intraday dealer-gamma structure across a session. Shares ``/api/flow/hedging``'s session window and 5-minute grid, so the two stack into one timeline: flow says how hard the tape is pushing, this says whether the book absorbs or amplifies it.
  - `symbol` string, required
  - `session` string, required
  - `rolling_bars` integer, nullable
  - `bars` GammaRegimeBar[], required
    - `timestamp` string, required
    - `bar_start` string, required
    - `bar_end` string, required
    - `spot` number, nullable
    - `anchored_lean` number, required
    - `anchored_stability` number, required
    - `anchored_net_shift` number, required
    - `anchored_gross_shift` number, required
    - `rolling_lean` number, nullable
    - `rolling_stability` number, nullable
    - `rolling_net_shift` number, nullable
    - `rolling_gross_shift` number, nullable
    - `sigma_price` number, nullable
    - `near_spot_stock` number, nullable
    - `strike_count` integer, required
    - `expired_expirations` string[]
    - `rolling_bars` integer, nullable
    - `gamma_flip` number, nullable
    - `flip_distance_pts` number, nullable
    - `flip_distance_frac` number, nullable
    - `cushion_pts` number, nullable
    - `cushion_side` string, nullable
    - `cushion_step_pts` number, nullable
    - `cushion_rate_pts` number, nullable
    - `cushion_accelerating` boolean, nullable
    - `cushion_state` string, nullable
    - `cushion_move_ratio` number, nullable
    - `cushion_basis` string, nullable
    - `cushion_rate_context` string, nullable
    - `typical_move_30m` number, nullable
    - `cushion_summary` string, nullable

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/zerogex/apis/zerogex-api.md) · [All operations](https://skmtc.dev/zerogex/apis/zerogex-api/llms.txt) · [OpenAPI document](https://skmtc.dev/zerogex/apis/zerogex-api/revisions/753b26bf0592?raw)