There's a three month trial period <a href=" http://incredibleaquagarden.co.uk/order-azithromycin-uk.pdf#fluently ">buy azithromycin online uk</a> While the shutdown itself is unlikely to cause major disruption in the markets, a fight over the debt ceiling could. In the last two days of the debt-limit standoff of August 2011, the New York Stock Exchange lost 11.2 percent of its value, and the deadlock led to a downgrade of the U.S. credit rating "AA " from "AAA" by Standard & Poors.