They had that information a week ago. Markets don't react to what was known a week ago. The react to what they think will happen in the future.
A week ago they were being told that there was still a chance to strike a deal before the deadline hit. On Friday Trump said that talks were still continuing and going well. Now they know that neither of those things were true.
The future is quote bright for US workers, wages, manufacturing and the economy in general. Buying opportunity.