Video: Business Bullet: US economy, Budget tax cuts, gold, Cheltenham Festival and the week ahead As markets test new levels upwards there is a danger of companies becoming over-valued. Meanwhile, the debate over the 50p top tax rate rages as business looks at other Budget measures to boost activity. Plus get an update on Business Bullet's 2012 gold nap, a tip for the Cheltenham Gold Cup and a preview of the week ahead, when full-year figures from Cairn Energy and B&Q owner Kingfisher will be released as well as the Bank of England's Quarterly Inflation Report.