Nothing that shows comprehension of the coming collapse, according to transcripts obtained by the New York Times:

Instead they continued to tell one another throughout 2006 that the greatest danger was inflation—the possibility that the economy would grow too fast.

“We think the fundamentals of the expansion going forward still look good,” Timothy F. Geithner, then president of the Federal Reserve Bank of New York, told his colleagues when they gathered in Washington in December 2006.

As we now know, as the transcripts prove, and as the Times states: "Some of the nation’s pre-eminent economic minds did not fully understand the basic mechanics of the economy that they were charged with shepherding."