Market Extra: Why the ‘sell Rosh Hashanah, buy Yom Kippur’ trade is a tough call as stock-market selloff deepens

This year, Rosh Hashanah, which is the beginning of the year according to the traditional Jewish calendar, begins at sunset on Sunday, Sept. 25. Yom Kippur, or the Day of Atonement, begins 10 days later on Tuesday, Oct. 4.