---
title: "Cost To Borrow"
method: GET
path: "/api/v1/index/short_ctb"
tags: ["Short Interest"]
---

# Cost To Borrow

`GET /api/v1/index/short_ctb`

Unlock a detailed view of the cost to borrow securities. This endpoint provides rich and actionable insights into the security lending fees associated with short selling and offers you a clear perspective on market behavior.

This API returns data for multiple stocks in an index for the specified date.

### Available Data Points:

*   **Date:** The specific date for which the data is retrieved (`YYYY-MM-DD` format).
*   **Operating MIC:** The operating Market Identifier Code of the security.
*   **Ticker:** The ticker symbol associated with the security.
*   **Exchange:** Symbol of the exchange where the security trades.
*   **Company:** The name of the company issuing the security.
*   **FIGI** The Financial Instrument Global Identifier.
*   **Share Class FIGI:** The Financial Instrument Global Identifier for the share class.

*   **Cost to borrow all:** The average lending fees for all outstanding loans presented as an annual percentage rate.
*   **Cost to borrow new** The average lending fees for all new loans taken out in the last trading day presented as an annual percentage rate.

**Try it out!** You can test the API with the **trial key** `TEST`. Simply include it in your request headers; either here, or add the header `"Ortex-Api-Key": "TEST"` to your http request.

**Trial key restrictions:** A list of randomly selected rows will be returned

**Get full access!** Get a key at [app.ortex.com/apis](https://app.ortex.com/apis)

## Query parameters

- `date` string, date
- `format` 'csv' | 'json'
- `index` 'Europe Top 600' | 'UK Top 100' | 'US-N 100' | 'US-S 500'
- `page` integer
- `page_size` integer
- `portfolio_name` string

## Response `200`

- PaginatedShortCTBIndexV1APIList
  - `paginationLinks` object
  - `length` integer, required
  - `rows` ShortCTBIndexV1API[], required
    - `date` string, date, required
    - `operatingMic` string
    - `exchange` string, required
    - `ticker` string, required
    - `company` string, required
    - `figi` string, required
    - `shareClassFigi` string
    - `costToBorrowAll` number, double
    - `costToBorrowNew` number, double

## Other responses

- `400` — Invalid request parameters
- `403` — Not authorized
- `404` — Data not found
- `429` — Rate limit exceeded
- `500` — Internal server error

---

[API](https://skmtc.dev/ortex/apis/ortex-apis.md) · [All operations](https://skmtc.dev/ortex/apis/ortex-apis/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/ortex/ortex-apis/revisions/2629fc613cdc/schema)