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Macau Daily Financial Commentary 09 05 11
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Macau Daily Financial Commentary 09 05 11
1.
Seng Heng Bank
– Center for Investment and Risk Analytics 誠興銀行 – 投資及風險研究中心 財來自有方 刊登日期:2009 年 3 月 30 日 (澳門日報) 作者為誠興銀行投資及風險研究中心分析員黃碩東 槓桿 ETF 筆者於本欄曾經介紹過 ETF(交易所買賣基金), 今期將與讀者分享什麼是 leverage ETF (槓桿式交易所買賣基金). 槓桿 ETF 如一般 ETF 一樣是於交易所作買賣.分別之處是在於一般 ETF 目標是 給予投資者所追蹤指數之同等回報, 而槓桿 ETF 則會給予 2 倍之回報.舉例說, 投資者買入追蹤標普 500 指數之槓桿 ETF Proshares Ultra S&P 500 (SSO),如標 普 500 上升 2%,即你的投資部位便會上升 4%.若投資者是看淡後市,便可參與 reverse leverage ETF (逆向槓桿式交易所買賣基金),這類 ETF 的特性是,如追 蹤指數下跌2%,那投資組合便會上升 4%. 由於是使用2倍槓桿,以上所說之 ETF 可稱為 2x ETF, 而於近月發行商更於美
2.
國市場上推出一系列之 3x ETF,
即追蹤指數上升 2%,那投資組合便會上升 6%. 這些槓桿 ETF 固然能增大投資者的回報,但卻穩藏了一些潛在風險. 明顯地如果投資者看錯市況,買進了 2x ETF, 而追蹤指數下跌 2%, 那便會錄得 4%之虧損.令一個更為重要的問題是由於數學上複合回報的定理,槓桿 ETF 的 結構其實只能模仿追蹤指數當天之回報.於長線投資來說其回報之誤差可以是 十分大.例如若投資者買進逆向 2x ETF ProShares UltraShort S&P 500 (SDS), 若 星期一追蹤指數標普 500 上升 4%, SDS 便會下跌 8%;星期二標普 500 下跌 3.8%,SDS 即會上升 7.6%. 以兩天的回報計算,標普 500 其實是無升跌,但 SDS 於同期卻下跌了 1%(100 * 0.92 * 1.076 = 99).這只是一個簡單兩個交易日之例 子,已經出現了達 1%之負回報誤差,可見長線投資於這類槓桿 ETF 之問題. 現時於香港市場主要還是以無槓桿 ETF 為主,但筆者相信這類槓桿 ETF 會越來 越多.本文探討了投資此類 ETF 之主要風險.槓桿 ETF 實屬只適宜作為短線投 資之產品. (讀者如有任何意見,可電郵至 feedback@stshb.com)
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