工具 API

get_ust_bill_rates

Fetch daily US Treasury Bill rates (discount and coupon-equivalent yields). Use when the user asks about T-bill rates, short-term government borrowing costs, or discount rates for Treasury bills. Returns daily rates for tenors: 4WK, 8WK, 13WK, 17WK, 26WK, 52WK. Fields include date, tenor, discount rate, coupon-equivalent yield, averages, maturity date, and CUSIP. Filterable by year. Costs 1 API call per request. For Treasury par yield curve rates (longer maturities up to 30Y), use get_ust_yield_rates.