Re: [新聞] 34歲股神「墜樓身亡」!除夕驚爆輕生
是這樣的
所謂開槓桿 與不開槓桿
在於一個字
叫做收益風險比
或應該說是五個字
以過去20年 SPY 做歷史回測
以SPY 20 年間的最大Sharp ratio 而言
最佳槓桿比是1.5 ~ 2
並且根據VIX 值動態調整倉位
SPY 隱含波動率越小 增高槓桿比
反之亦然
如果槓桿比超過2.5
遇到10年一次的金融風暴
最大跌幅可達爆倉的-100%
所以一昧追求低風險是不對的
但無節制增加槓桿也是不對的
龍年祝大家龍總探大吉
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