Markets shiver as Boehner ups ante in US shutdown By: CNBC.com News October 07, 2013 at 10:29 AM EDT What about the downside? What happens if we go past October 17? Markets will certainly move lower, and the downside would likely be another five percent. Read More >> Related Stocks: Alcoa Bank of America D.R.Horton Goldman Sachs Group JPMorgan Chase & Co Masco Corp Moody's Corp PulteGroup Realogy Holdings Corp Toll Brothers Inc United Technologies Wells Fargo