Are stock loan borrow rates available via the API?

Historical market data is available via a number of methods through our API offerings. The TWS API allows one to request historical bar data, historical tick data and histogram data, while the Web API allows one to request historical bar data.

For detailed documentation of this functionality and the associated limitations, please see:…

When you sell stock short, IBKR must locate and borrow shares to make delivery to the purchaser at settlement. Specific cost to borrow those shares depends upon the supply of shares available to borrow and the demand from other short sellers to borrow shares…

The Trader Workstation, by design, is intended as a real-time trading platform and it does not contain historical trade, position or account balance information. As the API is intended to provide only the data available within the TWS, this historical information is not available via the API as well…

With the exception of VWAP, chart studies and indicators are not available via API. While they are available in TWS Charts, they cannot be extracted into the API.

Additional Information…