---
title: "US Equities Detailed Adjustment Factors"
method: GET
path: "/v1/data/us-equity-ref/adj-factors-detail"
tags: ["us-equity-ref-corporate-actions"]
---

# US Equities Detailed Adjustment Factors

`GET /v1/data/us-equity-ref/adj-factors-detail`

The U.S. Equities Detailed Adjustment Factors dataset provides an event-level, fully attributed view of corporate actions that impact U.S. equity price and volume history. This dataset extends basic adjustment factors by exposing detailed metadata for each corporate event, enabling deeper analysis, auditability, and reconstruction of historical adjustments. In addition to the adjustment factor itself, each record includes the algoseek SecId, ticker symbol effective on the event date, event reason, and a unique corporate event identifier. The dataset also captures the security name, and the source of the corporate action information, providing a complete and transparent representation of how each event alters the underlying security’s attributes. This dataset is designed for users who require granular corporate-action tracking, detailed reconciliation, and high-fidelity historical back-testing, particularly in environments where adjustment provenance and event-level explainability are critical.

 For more details, please refer to the dataset documentation: [US Equities Detailed Adjustment Factors Guide](https://us-equity-reference-docs.s3.us-east-1.amazonaws.com/algoseek.US.Equity.Adjustment.Factors.Detailed.pdf).

<details>
<summary>**Advanced Filtering**</summary>

You can provide one or multiple filter expressions based on the dataset's columns to narrow down the results. For example, `StartDate.gt=2023-01-01&StartDate.lt=2023-12-31`, `Ticker=AAPL`. 

Please refer to the <a href="https://algoseek.com/docs/rest-api/tutorial/advanced-filtering">Advanced Filtering Guide</a> for the extensive reference.
</details>

## Query parameters

- `sort` string, nullable — Sorting criteria for the results. Provide a column name with optional prefix '+' for ascending order, or prefix with '-' for descending order. Multiple sorting fields may be supported depending on the dataset. If sort prefix is not provided, the ascending order is applied.
- `columns` string, nullable — A comma-separated list of columns to include in the response. Use this parameter to select only specific fields from the dataset. If not provided, all available columns will be returned.
- `offset` integer — Number of records to skip before returning results. To be used with the `limit` parameter for pagination. If not provided, defaults to 0.
- `limit` integer — Maximum number of records to return. Default and maximum values depend on the response format; see `format_limits` in the schema for details.
- `response_format` 'json' | 'csv' | 'csv_gzip' — Note the lowercase which is used for the consistency with other projects and tools

## Response `200`

JSON, CSV file, or gzip-compressed CSV file, depending on the value of `response_format` query parameter

- USEquitiesDetailedAdjustmentFactorsDataOut
  - `data` USEquitiesDetailedAdjustmentFactorsDataDetailsOut[], required
    - `ASID` integer, nullable — A unique identifier for a security
    - `Ticker` string, nullable — Symbol name
    - `Name` string, nullable — Company name
    - `ISIN` string, nullable — International Securities Identification Number
    - `EffectiveDate` string, date, nullable — The date on which the event becomes effective
    - `ReportDate` string, date, nullable — Date of the algoseek event report file
    - `Revision` integer, nullable — Version of the algoseek event report file
    - `AdjustmentFactor` number, nullable — The value of the Adjustment factor for the event
    - `AdjustmentReason` string, nullable — The reason for the Corporate Event
    - `EventType` string, nullable — Type of event
    - `EventId` string, nullable — Unique Event ID under the AdjustmentReason
    - `DivPayrate` number, nullable — The cash dividend payout rate
    - `DivCurrency` string, nullable — The currency of a cash dividend
    - `DivPaymentType` string, nullable — The type of divided payment
    - `Detail` string, nullable — Details of the event including Dividend Amount, Period (e.g., Interim), etc
  - `pagination` PaginationDetailsOut, required
    - `offset` integer — The number of records skipped to fetch the current page
    - `limit` integer, required — The maximum number of records in the current page
    - `next_offset` integer, nullable — The number of records to skip to fetch the next page

## Other responses

- `403` — Forbidden
- `422` — Validation Error
- `429` — Request rejected because the identity or team exceeded a configured monthly or per-minute usage quota. When available, the response includes rate-limit headers describing the current quota.

---

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