How to check the coupon details for variable bond with remark "unknown"?

IBKR receives information regarding announced and effective mandatory and voluntary corporate actions from a number of external sources. The information is then passed on to clients on a best-efforts basis. On mandatory corporate action notifications, we do not review information prior to sending therefore we cannot guarantee the timeliness nor accuracy of the information…

The preliminary and final prospectus for each listing will be available in the IPO Subscription page in the Client Portal.  You can also access them on the SEC's EDGAR website, which will include other company filings…

Though the ability to do backtesting analysis of custom algorithms is not offered by IBKR software, historical data is available from the TWS API with corresponding market data subscriptions which can be received by an external third party API application and potentially used for backtesting studies. For information about which 3rd party API applications support backtesting it is best to contact the 3rd party software vendor directly…

Floating Rate Notes (FRN) are US Treasuries where the coupon rate is indexed to an underlying reference rate, generally the 13 week T-Bill plus a defined spread, which will therefore change (or ‘float’) over the life of the Note.

The prevailing coupon rate for FRNs is displayed in the trading platforms on a best efforts basis via third party data providers, but investors should refer to the…