The roller coaster on Wall Street continues today. Bend financial advisor Bill Valentine is weighing in on all this volatility. He says everything that's happened over the past few weeks is grossly over-done. “And I think it’s better explained by investors memories of what happened in 2008. They are extremely skittish right now, and I don't mean to use term lightly but there literally is posttraumatic stress disorder going on. People are over-reacting to what's going on now. I'm a fiscal hawk. I understand the seriousness of what's going on in our national balance sheet level; but none of what's happened in the last two weeks is explained by the S & P downgrade - it’s more explained by skittish nerves."  He says compared to 2008, banks and corporations are in much better shape; interest rates are still historically low, and we're in a growth pattern overall.