US Treasury 6 Month Bill ETF (XBIL US) – Portfolio Construction Methodology

The underlying Bloomberg US Treasury Bellwether 6M Total Return USD Unhedged Index targets the on-the-run 26-week US Treasury bill. The index comprises a single constituent—the most recently auctioned 6-month T-bill—purchased on the rebalancing date and held for the full month, providing pure exposure to the current 6-month tenor. Eligibility is limited to US Treasury bills; weight is 100% in the selected issue with full reinvestment of coupon-equivalent discount accretion and cash flows in the same bill until the next rebalance. The index reconstitutes and rebalances monthly at month-end, rolling to the latest on-the-run bill to maintain target maturity; there are no issuer, sector, or concentration caps. Index returns reflect price changes and earned discount over each monthly holding period, with no duration banding or multi-issue optimization.

To explore XBIL in more depth, visit our ETF analytics platform for institutional-grade insights — including performance and risk metrics, correlations, sensitivities, and factor exposure: https://www.etfstrategy.com/etf/XBIL_US