股票投资风险是股票投资者购进股票后遭遇股价下跌损失的可能性。一般可理解为卖出价格低于预期价格的差距，或实获股息未能达到预定的标准。股票市场交易价格往往一日数十变，价涨即获利，价跌即亏损，有时连涨数日获利丰厚，有时连跌数日损失惨重。股票市场上的机遇和风险总是同时存在、同时发展、同时减退的，投资者在期望获取高额收益的同时，必然要承担相应巨大的风险。股票投资风险，可分为总体风险和个别风险两大类。
并利用随机微分方程和偏微分方程之间的关系，对股票投资风险进行了估计，得到关于风险指标的动态轨线。
By using the relation between the stochastic, differential equations and the PDEs, we estimate the risk of investing stocks, and obtain the dynamic traces 'of risk functions.
企业利用衍生金融工具进行规避风险，套期保值，主要表现在对利率风险、外汇风险、股票投资风险等风险的管理上。
The corporation use financial derivative instruments to hedge, mainly performance in the management of interest rate risk, foreign exchange risk, stock risk and so on.
“这是股票，而非信贷风险”其中一位银行家说，“今天如果股票投资者把钱投给JLR，那他们就希望有40% - 50%的回报。”
"This is equity risk, not credit risk," says one: if equity investors were to put money into JLR today, they would want a 40-50% return.
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