美聯儲持續印鈔下的老百姓對策 - 投資
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By Caroline
at 2021-01-25T21:12
at 2021-01-25T21:12
Table of Contents
推 mickl8101: 諾貝爾經濟學獎得主的獲利公式 這本書有探討這種操作 01/24 20:37
推 Delisaac: 其實這觀念是正確的 但僅適用有穩定收入的年輕人 01/25 09:52
→ Delisaac: 有興趣的可以研究lifecycle investing這本書 01/25 09:52
推 Delisaac: 推文mickl8101有提到這本書的中譯本了 可以去看看 01/25 09:59
這本書的中譯本翻譯的非常糟,糟到媲美機器翻譯的程度
(甚至還有混淆 "100股選擇權" 與 "100口選擇權" 的錯誤...)
有興趣的人建議直接買原文書,不要買中譯版
Ian Ayres 與 Barry Nalebuff 的 <<Lifecycle investing>>
雖然建議年輕人使用槓桿讓股票比重達到200%
但所持的理由與通貨膨脹高低無關
甚至如果預期通貨膨脹率較高
對未來收入的折現率或許該提高
從而導致使用200%槓桿的時間減少
===================================================================
我對這本書的summary:
在投資者年輕時,金錢有限,絕大多數資本為未實現的人力資本
在投資者年老時,大多數人力資本已轉換為金錢
如果將金錢依固定比例投入股債比
則年輕時對股市曝險過低
而年老時對股市曝險過高
在時間上對股市的曝險不夠分散
從而,作者提議將未來收入折現至現值
並根據個人的風險偏好決定固定比例的對股票曝險
將折現的終身資本現值乘上對股票曝險比例得到理論上的股票曝險目標金額
作者建議年輕人使用槓桿提高對股市曝險直到曝險達到目標金額為止
然後可隨資本累積降低槓桿但維持曝險金額
====================================================================
我的comment:
問題在於實踐上如何取得低風險且低利率的槓桿
實踐上的困難與複雜度使得本書關於槓桿的部份未必適用於大多數的人
不過如果接受作者關於diversify over time的想法
即使不使用槓桿,年輕人仍可考慮在前期維持100%的股票曝險
直到股票曝險達到目標金額後不再增加股票曝險使股票比重自然下降
這個做法就跟一些 Life strategies funds 有些類似
只是 Life strategies funds 的起始股票比重通常頂多90%,隨年齡增加漸減至50%
Life strategies funds 選擇的起始股票比重與漸減速度
似乎沒有充分的理論依據,只是一種經驗公式
而這個做法則提供了一種根據個人目標與財務狀況決定股票曝險的理由
--
So stand by your glasses steady,
Here’s good luck to the man in the sky,
Here’s a toast to the dead already,
Three cheers for the next man to die.
--
Tags:
投資
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