Via Bloomberg, a little slice of American lore:
The New York Stock Exchange is closed today, as it has been every Good Friday for nearly a century and a half except for in 1898, 1906 and 1907. That last one was in the same year as the infamous Panic of 1907, when the value of U.S. stocks plunged by more than a third. Hence, a legend that persists 101 years later: Traders get to stay home the Friday before Easter not just because it's a Christian holy day but because of its association with one of history's great bear markets.