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今日学习笔记:无风险收益率的应用

  • 2026-03-28 11:59:49
今日学习笔记:无风险收益率的应用

无风险收益率,简单说就是你啥也不干就能躺赚的回报率。

在投资里,主要就两个作用:

第一,它是所有投资决策的“机会成本”参照物。

比如你手里有笔钱,现在有两个选择:A是买年息3%的国债,B是买一家公司股票。你琢磨B的时候,心里那杆秤就得掂量一下:这家公司未来的回报,值不值得我放弃那稳稳的3%?

如果经过分析,判断它未来能提供的回报率,扣掉你付出的脑力和承担的风险后,还显著高于3%,那这笔投资才值得考虑。如果算来算去,可能也就比3%高一点点,甚至还不如,那这笔投资的意义何在?——不如直接买国债睡大觉。

第二,它是我们给企业估值时的“锚”。

在估值时,经常用到一个简化思路:把一家符合“三大前提”(利润为真、可持续、维持当前盈利能力无需大量资本投入)的优秀企业,三年后视为一份“类债券资产”。

这时候,无风险收益率就派上用场了。

假设当前的无风险收益率是4%,那么一份永续增长率为4%的“完美债券”,它的合理市盈率是多少?其实就是 1 / 4% = 25倍。

所以,在估值框架里,对这类企业,三年后的合理估值常常就大概定为 “三年后净利润 × 25倍~30倍”(25倍对应4%无风险收益率,留点余地可以给到30倍)。然后,用这个三年后合理估值的 50% 左右,作为今天的理想买点。

这个“25倍”是怎么来的?

其实就是前面说的,把企业未来永续增长率假设为等于无风险收益率(比如4%),同时,为了覆盖股票比债券更高的风险,我们把折现率设为无风险收益率的两倍(即8%)。

套用永续增长模型:价值 = 自由现金流 / (折现率 - 永续增长率)。

当自由现金流用净利润近似替代时,就变成了:合理估值 = 净利润 / (8% - 4%) = 净利润 / 4% = 净利润 × 25。

看,绕了一圈,又回到了“25倍市盈率”这个锚上。

所以,无风险收益率波动,会直接影响我们估值中的那个“倍数”。 

如果无风险收益率降到3%,那个倍数就可能变成33倍左右(1/3%≈33.3);如果升到5%,倍数就可能变成20倍(1/5%=20)。

最后,这个数去哪找?

不用搞得太复杂。看看十年期国债收益率,或者更直接的,看看余额宝、微信零钱通、银行主流保本理财的收益率,在那个数字上稍微加一点,就够用了。

比如现在货基收益率大概1.8%,银行理财2%出头,你心里把无风险收益率按 2.5%~3% 来估算,完全没问题。它是个模糊的正确,不需要精确到小数点后两位。它的核心作用是让你在思考时,有个比较的基准,知道“稳稳的幸福”大概是什么价。

知道这个,然后呢?

然后就是记住这句话:投资回报率(可以近似看作市盈率的倒数)长期来看,有向无风险收益率靠拢的引力。

当你看上某个标的,发现它的潜在回报率(比如市盈率10倍,回报率就是10%)远高于无风险收益率时,你就要去深究:是市场先生疯了,还是这公司有什么陷阱或隐患?把这问题想明白了,赚钱的机会也就来了。

反之,如果一大堆资产的回报率都低于无风险收益率(比如市盈率普遍40倍、50倍),那往往就是该系好安全带、甚至考虑离场的时候了。

市场先生疯起来,可不认人。

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  1. CONNECT:[ UseTime:0.000736s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001197s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000565s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000553s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001098s ]
  6. SELECT * FROM `set` [ RunTime:0.000459s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001142s ]
  8. SELECT * FROM `article` WHERE `id` = 478354 LIMIT 1 [ RunTime:0.000854s ]
  9. UPDATE `article` SET `lasttime` = 1774762085 WHERE `id` = 478354 [ RunTime:0.001525s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000475s ]
  11. SELECT * FROM `article` WHERE `id` < 478354 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000787s ]
  12. SELECT * FROM `article` WHERE `id` > 478354 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001538s ]
  13. SELECT * FROM `article` WHERE `id` < 478354 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001578s ]
  14. SELECT * FROM `article` WHERE `id` < 478354 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001502s ]
  15. SELECT * FROM `article` WHERE `id` < 478354 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003518s ]
0.148295s