注册会计师 财管 投资项目资本预算13 警惕IRR背后的数学陷阱 episode artwork

EPISODE · Jul 18, 2026 · 16 MIN

注册会计师 财管 投资项目资本预算13 警惕IRR背后的数学陷阱

from 飞凡26CPA:财务成本管理|从逻辑推导到高效通关

【本期主题】 内涵报酬率IRR的数学本质与致命缺陷——高次方程无解/多解的"灵异现象"、再投资假设的乌托邦色彩,以及MIRR对缺陷的拨乱反正。【核心案例】 5次以上多项式无通用求根公式(阿贝尔-鲁菲尼定理);现金流-100、+230、-132的"奇葩案例":IRR双解10%和20%,MIRR唯一解14.04%(资本成本14%时勉强可行);IRR假设以50%无限复利再投资的不切实际;MIRR的"卸甲披甲":负现金流折现到起点、正现金流复利到终点,消除正负交替。

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注册会计师 财管 投资项目资本预算13 警惕IRR背后的数学陷阱

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