Shemitah and 29 Elul
1) 17 Sept 2001 (29 Elul)
The destruction of the Twin Towers and other properties caused serious damage to the economy of Lower Manhattan and had a significant effect on global markets, closing Wall Street until September 17.
NEW YORK (CNNfn) - U.S. stocks plunged to their lowest levels in nearly three years Monday, and the Dow Jones industrial average suffered its worst point-loss in history as trading resumed for the first time following last week's terrorist attacks.
2) 29 Sept 2008 (29 Elul)
2008 – Following the bankruptcies of Lehman Brothers and Washington Mutual, The Dow Jones Industrial Average falls 777.68 points, the largest single-day point loss in its history.
NEW YORK (CNNMoney.Com) -- Stocks skidded Monday, with the Dow slumping nearly 778 points, in the biggest single-day point loss ever, after the House rejected the government's $700 billion bank bailout plan.
The day's loss knocked out approximately $1.2 trillion in market value, the first post-$1 trillion day ever, according to a drop in the Dow Jones Wilshire 5000, the broadest measure of the stock market.