Considering that Passover is commonly referred to as "The Festival of Unleavened Bread" it seems fitting that the leading economic indicator of the 7-day Jewish festival is matzo, the cracker-like flat bread that you'll see on the endcap displays at many supermarkets each year in late March -- not particularly tasty, but fun if you like saltines.
According to Nielsen, Americans chowed down on $3.5M worth of matzo during 2009's Passover holiday, with another $1.2M purchased in the form of matzo meal/mixes (I'm guessing that means matzo ball soup, etc.). For anyone who loves matzo, this week is like heaven for you. Anyone who makes habitual visits to the local bakery may experience withdrawals.
In addition to a nice bump for the matzo industry, producers of kosher table wines also get a boost from the Passover holiday, according to Nielsen. About 13% of the annual sales ($6.5M) for the kosher wine industry comes from the Passover Seder -- a dinner held on the first night of Passover. That equates to about 1.5 million bottles of vino.