I have stocks, bonds, and oil but I want also to add one more final asset, we'll call it the riskless asset, long-term bonds are somewhat uncertain and variable because they're long-term.
有股票,债券和石油,我还想再增加最后一种资产,我们称之为无风险资产,由于长期债券持有期限很长,存在一定不确定性及风险。
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