How big a disappointment in tomorrow’s jobs number is needed to keep stocks moving down?

If U.S. stocks hadn’t plunged yesterday on worries that the U.S. economy was slowing, you could bet that traders would be looking to sell today. Economists are looking for tomorrow’s jobs number to show the private sector to have added 180,000 jobs in May. That would be a huge drop from the 268,000 jobs added in April. But no one is sure how much disappointment is already baked into stocks.