LSEG is currently reviewing its US investment-grade bond fund flow data following a significant error identified by JPMorgan Chase & Co. JPMorgan analysts, including Nathaniel Ruan, flagged that LSEG's data had substantially overstated outflows from these funds. The discrepancy arose from the inclusion of money market funds within the investment-grade bond fund category for the week ending July 17, leading to an inflated outflow figure.

Initially, LSEG reported record outflows of $10.9 billion from US investment-grade bond funds for the week ending July 17. However, JPMorgan's analysis corrected this figure, stating that actual outflows were closer to $2.3 billion, a difference of $8.6 billion. This correction was crucial as the initial LSEG report had suggested a much more severe exodus of capital from investment-grade bonds than truly occurred.

This incident is not unprecedented; a similar error occurred around the same time last year. At that time, LSEG (then Refinitiv, before its integration with the London Stock Exchange Group) also conflated money market funds with bond funds, leading to an overestimation of outflows. The recurring nature of this error highlights potential issues in data categorization and verification processes.

LSEG acknowledged the error and confirmed it was investigating the matter. As of the latest reports, US investment-grade bond funds saw record weekly outflows of $7 billion for the week ending July 24, according to other financial news. This ongoing volatility and the need for accurate data underscore the importance of reliable financial reporting in market analysis.