Mirant ( MIR) has thrown some new and complicated figures at investors long deprived of any numbers at all. A week after filing three years' worth of financial statements, Mirant followed up on Wednesday by providing financial guidance for the future. But by using an unfamiliar metric, the company left information-starved investors in the dark again. The company said it expects to earn $800 million in "adjusted EBITDA," a nonstandard measure of earnings before interest, taxes, depreciation and amortization, this year. But Mirant offered no traditional guidance for earnings per share, as it has in the past. "The company believes adjusted EBITDA provides a more meaningful measure of the company's underlying operating performance," Mirant stated in a prepared release Wednesday. The market seemed hesitant to embrace the new figure. The stock dropped more than 5% to $2.99 before it bounced back to within a nickel of Tuesday's $3.17 closing price on Wednesday.