BYD Co Ltd has announced its second quarter financial results for the fiscal year 2010-11 today. In a statement it has informed that there has been a marginal hike in the net profit in the quarter under review against its like period a year ago. BYD Co Ltd is the leading Chinese carmaker which is backed by U. S. billionaire Warren Buffett. Buffett's Berkshire Hathaway holds 10% of state in this firm.