How often are the borrow rates in TWS updated?

Overview:

Our clients have the ability to gain direct exposure to US Treasuries on both the short and long side of the market…

The TWS Market Scanner results are based on the data available within TWS. If you only have delayed data available, then Market Scanner results will be based on the delayed data available. If there is data available in the Pre-Market or Post-Market sessions, then Market Scanner results will be shown accordingly…

The stock borrow Fee Rate is available via the API using the Historical Data Function. This data is available in various units of duration up to the present moment and additional information is…

As background, the short stock availability list represents the inventory of shares which IBKR has available to lend and which other brokers have indicated that they have available to lend. While it is updated on a near real-time basis throughout the day for changes to IBKR's inventory and periodically throughout the day to reflect updates to the availability lists of other brokers, many brokers provide updates only once per day…