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\<ahelp hid=\"hid_aai_func_tbilleq\"\>米国財務省短期証券 (tb) の債券に相当する利回りを返します\</ahelp\>米国財務省短期証券は、決済日に購入され、同年内の満期日に満額で支払われます。購入額からは割引率が引かれます。
\<ahelp hid=\"hid_aai_func_tbilleq\"\>calculates the annual return on a treasury bill ().\</ahelp\> a treasury bill is purchased on the settlement date and sold at the full par value on the maturity date, that must fall within the same year. a discount is deducted from the purchase price.