Egypt's central bank cut back on the amount of 273-day treasury bills it was prepared to sell at an auction on Sunday after the yields that potential buyers were demanding increased. The average yield on the bills that the central bank sold rose to 15.822 percent from 15.645 per cent at the last issue on 17 January, it said. It sold bills worth LE1.452 billion ($240.7 million) instead of the LE4 billion pounds it had originally asked for. The central bank sells the bills on behalf of the Finance Ministry.