Does "Seasonality" Support a December Rally?

Is hope an investing strategy? No, but as November draws to a close, many investors are hoping some holiday cheer in stock markets and a potential December rally.
In this episode Brian takes a look at what clues seasonality data may give us for stock market performance in December. It turns out that while, historically, December has been a very strong month for stocks, in recent years seasonality trends have been weaker, and a December rally has often failed to appear following a difficult year for stocks.
Charts:

1. December up more than any other month
2. December seasonality not as strong lately
3. A bad year or midterm can stifle a December rally

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