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The Smart Beta Mirage
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AI
DOI：10.1017/S0022109023000674.png)
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摘要
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We document and explain the sharp performance deterioration of smart beta indexes after the corresponding exchange-traded funds (ETFs) are launched for investment. While smart beta is purported to deliver excess returns through factor exposures, the market-adjusted return of smart beta indexes drops from about 3% on paper before ETF listings to about -0.50% to -1% after ETF listings. This performance decline cannot be explained by variation in factor premia, strategic timing, or diminishing returns to scale. Instead, we find strong evidence of data mining in the construction of smart beta indexes, which helps ETFs attract flows, as investors respond positively to backtests.
Keyword:
CROSS-SECTION
FUND
RETURNS
RISK
ETFS
期刊
IF:
2.8
论文数:
2.3K
被引数:
1.0W
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