剛查了一下， 是像你所說的， T-bill 小於一年， T-Bond 大於兩年。

但這段是什麽意思。“T-bill do not pay any coupon. They are floated as a zero-coupon bond to the investors at a discount to the face value. At the end of the maturity period, the investors get the interest from the instrument in the form of return by receiving the face value from the bill." 是不是T-bill不付利息，賺的是 買入價和票麵價的差價？