Rice Energy Inc. (RICE) , a natural gas producer with risky credit, raised $900 million in three days this month, $150 million more than it originally sought. Not bad for the Canonsburg, Pennsylvania-based company’s first bond issue after going public in January. Especially since it has lost money three years in a row, has drilled fewer than 50 wells — most named after superheroes and monster trucks — and said it will spend $4.09 for every $1 it earns in 2014. The U.S. drive for energy independence is backed by a surge in junk-rated borrowing that’s been as vital as the technological breakthroughs that enabled the drilling spree . While the high-yield debt market has doubled in size since the end of 2004, the amount issued by exploration and production companies has grown nine-fold, according to Barclays Plc. That’s what keeps the shale revolution going even as companies spend […]