From rattraders.com:
Rats are being trained to become superior traders in the financial markets. Our subjects [rats] learn to recognize patte[r]ns in historical stock and futures data as well as generating trading signals. We provide solutions for tick based trading data and day based data. RATTRADERS rats can be trained exclusively for any financial market segment. They outperform most human traders and represent a much more economic solution for your trading desk.
Kid you not!
Read the whole thing here.