常見例句雙語例句More than half of China's foreign exchange reserves are the U. S. Treasury bond. However, there has little study about the investment portfolio of the U.然而對美國國債組合投資的研究卻很少，因此對美國國債投資組合的研究就有著重要的現(xiàn)實(shí)意義和理論價(jià)值。This paper investigates the optimal investment portfolio with stock, defaultable zero-coupon bond, treasury bond and money market account when the investor faces default risk.研究了投資者面對違約風(fēng)險(xiǎn)時(shí)，在由可違約零息債券、股票、國債及貨幣市場賬戶組成的投資組合之間進(jìn)行最優(yōu)投資的問題。 返回 treasury bond investment portfolio