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McRib indicator. When McDonald’s releases its McRib each year for a limited time, the S&P 500 has “an average daily return about 7 basis points higher” than on days when the McRib is off the menu. This is according to data from 2010 to 2017 (the McRib was available on ~19% of all trading days). Correlation or causation? I’d like to believe causation, but unfortunately, the difference is not statistically significant.
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