# Short Interest Historical Data for Backtesting: TSLA and NVDA

**Use case:** 

Download short interest historical data for TSLA and NVDA across a chosen date range, with a knowable date on every row so your backtest never uses figures before they were public. Quant researchers can join the series to price data without look-ahead bias. Change the tickers and settlement dates to pull years of FINRA history back to 2017.

## Input

```json
{
  "symbols": [
    "TSLA",
    "NVDA"
  ],
  "market": "exchange",
  "latestOnly": false,
  "settlementDateFrom": "2025-01-01",
  "settlementDateTo": "2025-03-31",
  "monitorMode": false,
  "maxItems": 12,
  "proxyConfiguration": {
    "useApifyProxy": true
  }
}
```

## Output

```json
{
  "symbol": {
    "label": "Ticker",
    "format": "string"
  },
  "settlementDate": {
    "label": "Settlement date",
    "format": "string"
  },
  "knowableDate": {
    "label": "Knowable date (use for joins)",
    "format": "string"
  },
  "shortInterest": {
    "label": "Short interest",
    "format": "number"
  },
  "daysToCover": {
    "label": "Days to cover",
    "format": "number"
  },
  "isRevised": {
    "label": "Revised",
    "format": "boolean"
  },
  "hadStockSplit": {
    "label": "Split",
    "format": "boolean"
  }
}
```

## About this Actor

This example demonstrates how to use [US Short Interest Scraper: NYSE, Nasdaq and OTC via FINRA Data](https://apify.com/getascraper/short-interest-scraper.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/getascraper/short-interest-scraper.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

This Task's input is already configured above. Use it as-is rather than inventing a new one.

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/getascraper/short-interest-scraper.md

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).