Top Express Consultants is suing Bank of China (HK) over Lehman Brothers minibonds that it said it was misled into buying. The company filed a writ in the High Court yesterday seeking damages of more than HK$4 million it invested in minibonds because, it said, it was misled into thinking the minibonds had a higher yield than a fixed deposit and were risk free. It said the bank did not explain the nature of the derivatives. In July 2009, BOC offered a 60 per cent refund of the investment to all individual minibond investors, but Top Express Consultants was denied a refund as it was a corporation, it said.