Cramer: Wall Street insanity playing a cruel joke? By: CNBC.com News April 27, 2015 at 18:16 PM EDT Jim Cramer ponders if Wall Street has completely lost its marbles, or if there could be bigger trends at work behind the scenes impacting investors. Read More >> Related Stocks: Apple Celgene Corp Freeport-McMoRan Helmerich & Payne UnitedHealth Group