After declining last year, fortune of steel and power clan, whose matriarch chairs the O.P Jindal Group, rose as steel prices recovered. Mumbai-based son Sajjan saw shares of his JSW Steel almost double in the past year. In May he agreed to acquire a 1,000-megawatt thermal power unit for $750 million from his struggling younger sibling Naveen's Jindal Power & Steel, which is weighed down by $3.6 billion in debt.