The difference between the present value of cash inflows and the present value of cash outflows. NPV is used in capital budgeting to analyze the profitability of an investment or project. 现金流入的现值和现金流出的现值之间的差额。 NPV是用在资本预算分析的投资或项目的盈利能力。 The net present value of a project is the present value of current and future benefit minus the present value of current and future costs. 一个项目的净现值是当前和未来的收益减去当前和未来成本的现值的现值。 Payback Period allows investors to assess the risk of an investment attributable to the length of its investment life. Easy to calculate and understand.
Basic payback period ignores the time value of money. This limitation can be overcome by applying the discounted payback period. Payback period does not take into account the level of cash flows of an investment after the payback period. In other words, payback period ignores the overall profitability of investments. Basic payback period can be difficult to calculate where multiple negative cash flows are incurred during the investment period. This problem can be solved by calculating the modified payback period as discussed above. Payback period does not provide a theoretically absolute decision rule like other appraisal methods (e.g. all investments with positive NPV should be accepted) and is therefore susceptible to subjective interpretation. Explanation
Payback Period is the duration needed to recover the cost of investment. All other things equal, the investment with a shorter payback period should be preferred. Long payback periods increase the riskiness of investments because the uncertainty increases with the length of time. 投资回收期允许投资者评估的原因是其投资生命的长度投资的风险。 容易计算和理解。
基本投资回收期忽略了资金的时间价值。这种限制可以通过应用折现回收期来克服。 投资回收期不考虑回收期后的投资现金流的水平。换句话说，投资回收期忽略投资的整体盈利能力。 基本投资回收期可能很难计算，其中在投资期间都发生多负现金流。这个问题可以通过计算改性回收期如上所讨论的解决。 投资回收期不提供像其他评估方法的理论绝对的决策规则（如用净现值为正的投资都应该接受），因此容易受到主观的解释。 说明
Making the investment decision
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