From this morning's FT by Abby Cohen (www.ft.com/cohen):
"A well-anticipated correction to a bull run usually doesn't last long as many portfolio managers use it as an entry point into the market. We believe that US shares are currently undervalued and that this will also offer some buffer against disappointing news. Of course, the catalyst of the correction is critical in the analysis."
This caught my eye but too late. Of course I wouldn't know a pesky catalyst if I fell over one. Mostly, I hate it when the bad news bears have their inning.