> ## Documentation Index
> Fetch the complete documentation index at: https://docs.anthid.com/llms.txt
> Use this file to discover all available pages before exploring further.

# List short sale borrow rates

> Lists overnight borrow rates from each broker's latest loaded list. Either date parameter selects history; both bounds include the named New York calendar day, and an omitted bound is open. Rates are dollars per share per night. Null means no premium was stated; no row means the symbol was not listed. Results sort by symbol, broker and time. Continue with `next_cursor` until null.



## OpenAPI

````yaml /api-reference/instruments.openapi.json get /v1/instruments/short-rates
openapi: 3.1.0
info:
  title: instruments
  description: ''
  license:
    name: ''
  version: 0.1.0
servers:
  - url: https://api.anthid.com
    description: Production
security: []
tags:
  - name: Instruments
    description: Read the shared instrument catalogue
  - name: Instruments
    description: Read what a broker charges to hold a short position overnight
paths:
  /v1/instruments/short-rates:
    get:
      tags:
        - Instruments
      summary: List short sale borrow rates
      description: >-
        Lists overnight borrow rates from each broker's latest loaded list.
        Either date parameter selects history; both bounds include the named New
        York calendar day, and an omitted bound is open. Rates are dollars per
        share per night. Null means no premium was stated; no row means the
        symbol was not listed. Results sort by symbol, broker and time. Continue
        with `next_cursor` until null.
      operationId: listShortRates
      parameters:
        - name: broker
          in: query
          description: Broker filter. Omit for all brokers; unspecified returns 400
          required: false
          schema:
            $ref: '#/components/schemas/Broker'
          example: lightspeed
        - name: symbol
          in: query
          description: The exact spelling of the symbol, as the broker lists it
          required: false
          schema:
            type: string
          example: AAPU
        - name: start_date
          in: query
          description: First day of the history window, inclusive, on the New York calendar
          required: false
          schema:
            type: string
            format: date
          example: '2026-10-01'
        - name: end_date
          in: query
          description: Last day of the history window, inclusive, on the New York calendar
          required: false
          schema:
            type: string
            format: date
          example: '2026-10-02'
        - name: next_cursor
          in: query
          description: Cursor from the previous page
          required: false
          schema:
            type: string
        - name: limit
          in: query
          description: Page size; defaults to 1000 and is clamped to 1 through 10000
          required: false
          schema:
            type: integer
            minimum: 0
          example: 1000
      responses:
        '200':
          description: A page of borrow rates
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListShortRatesResponse'
              example:
                data:
                  - as_of: '2026-10-02T14:38:00Z'
                    broker: lightspeed
                    rate_per_share: null
                    symbol: AAPL
                  - as_of: '2026-10-02T14:38:00Z'
                    broker: lightspeed
                    rate_per_share: '0.0048'
                    symbol: AAPU
                next_cursor: null
        '400':
          description: A filter, date window or cursor is invalid
          content:
            application/json:
              schema:
                type: string
            text/plain:
              schema:
                type: string
        '401':
          description: Missing or invalid authentication credentials
        '429':
          description: Caller exceeded the request rate limit
        '500':
          description: Unexpected server error while reading short rates
          content:
            application/json:
              schema:
                type: string
      security:
        - bearerAuth: []
        - clientCredentials: []
        - apiKeyAuth: []
components:
  schemas:
    Broker:
      type: string
      enum:
        - unspecified
        - lightspeed
    ListShortRatesResponse:
      type: object
      required:
        - data
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/ShortRateRecord'
        next_cursor:
          type:
            - string
            - 'null'
          description: >-
            Cursor for the next page, or null when the page just returned was
            the

            last one.
    ShortRateRecord:
      type: object
      description: One line of a broker's overnight borrow list.
      required:
        - broker
        - symbol
        - as_of
      properties:
        as_of:
          type: string
          format: date-time
          description: |-
            When the broker's list was read. Every line of one list carries the
            same value.
        broker:
          $ref: '#/components/schemas/Broker'
          description: Who charges the rate.
        rate_per_share:
          oneOf:
            - type: 'null'
            - $ref: '#/components/schemas/Price'
              description: >-
                Dollars per share, per night held. Not an annualised percentage.


                Null means the broker lists the symbol and states no premium for
                it,

                which is not the same as a stated rate of zero.
        symbol:
          type: string
          description: The broker's spelling of the symbol.
    Price:
      type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
    clientCredentials:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: Machine bearer token from the client_credentials grant.
    apiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key

````

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