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stock returns are fairly weakly correlated across time, cointegration implies very high Sharpe ratios. To the extent that … the theoretical Sharpe ratios are "too large," this suggests that either (i) cointegration does not exist pairwise among … is little evidence of cointegration, favoring the first explanation …
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Investigating linkages between credit and equity markets, we consider daily aggregate U.S. CDS spreads as well as well-chosen equity market and implied volatility indexes over ten years. We describe such robust (to spurious correlation) relationship with the quantile cointegrating regression...
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