Many lawyer jokes are easily adapted to the financial industry - just substitute "Wall Street banker" for every instance of "lawyer" below and they all kind of roll off your tongue :
Q: What do you call 5000 dead lawyers at the bottom of the ocean?
A: A good start!
Q: How can you tell when a lawyer is lying?
A: His lips are moving.
Q: What's the difference between a dead dog in the road and a dead lawyer in the road?
A: There are skid marks in front of the dog.
Found on : http://themessthatgreenspanmade.blogspot.com/2009/12/wall-street-less-popular-than-congress.html.