PHOTO: REUTERSJANE Street is repaying US$5.5 billion of floating-rate loans as part of a broader overhaul of its US$11 billion debt load. A representative for Jane Street declined to comment. Fitch’s long-term issuer default rating for Jane Street is BBB-, the lowest investment-grade level. Jane Street has been buoyed by volatile markets as well as private, longer-term investments in artificial intelligence and technology firms. Closely held companies such as Jane Street do not need to publicly disclose financial results.