Optionable's Many Red Flags

The Globe and Mail, Tara Perkins & Sinclair Stewart, 25 May 2007Optionable Inc., the tiny energy brokerage that is at the centre of a spiralling trading scandal, sits in a non-descript building in the small town of Valhalla, N.Y. But before its troubles began this year, before it was linked to a $680-million loss at Bank of Montreal, and slapped with a half-dozen class-action lawsuits, the energy