风险溢价是指价债券利率与无风险证券利率之差
The return in excess of the risk-free rate of return that an investment is expected to yield. An asset's risk premium is a form of compensation for investors who tolerate the extra risk - compared to that of a risk-free asset - in a given investment.
Investopedia Says:
Think of a risk premium as a form of hazard pay for your investments. Just as employees who work relatively dangerous jobs receive hazard pay as compensation for the risks they undertake, risky investments must provide an investor with the potential for larger returns to warrant the risks of the investment.
For example, high-quality corporate bonds issued by established corporations earning large profits have very little risk of default. Therefore, such bonds will pay a lower interest rate (or yield) than bonds issued by less-established companies with uncertain profitability and relatively higher default risk.
风险溢价(Riskpremium)，是一个人在面对不同风险的高低、且清楚高风险高报酬、低风险低报酬的情况下，会如何因个人对风险的承受度影响其是否要冒风险获得较高的报酬，或是只接受已经确定的收入，放弃冒风险可能得到的较高报酬。确定的收入与较高的报酬之间的差，即为风险溢价。
风险溢价指的是投资人要求较高的收益以抵消更大的风险。财务动荡的公司所发行的“垃圾”债券通常支付的利息高于特别安全的美国国债利息，因为投资人担心公司将无法支付所承诺的款项。
风险溢价是金融经济学的一个核心概念，对资产选择的决策，资本成本以及经济增值(EVA)的估计具有非常重要的理论意义，尤其对于当前我国社保基金大规模地进入股票市场问题具有重要的现实意义。
