We're beginning to see data releases for those weeks now, and they're beginning to reveal a grim economic picture. Betsey Stevenson of President Barack Obama's Council of Economic Advisers has pointed to this chart:
We'll have to wait to see the October data but we already have indicators that the shutdown/default threat hurt empt. pic.twitter.com/bM7AtBD1l9— Betsey Stevenson (@CEABetsey) October 22, 2013
You can see that employers reporting that they were hiring fell just as initial unemployment insurance claims surged. This squeeze and poor labour market data are exactly why investors are now expecting tapering to come later.
Before today's jobs release not many thought that the Federal Reserve would begin tapering as soon as December. Now Barclays have left that December taper camp (they're now forecasting that asset purchases will be scaled back from March 2014).
The idea is that loose Fed policy will continue to offset the negative aggregate demand shock that was the federal government shutdown.