Bids from investment intermediaries willing to release the residual, state-owned stakes in Solvay-Sodi, Heavy Machine Construction of Radomir, the lead and zinc smelter of Kardzhali, Druzhba of Plovdiv, Bules of Bourgas, the Rila Hotel in Borovets and the Riviera resort village must be submitted at the Bulgarian Stock Exchange (BSE) by this weekend. Solvay Sodi's paper was released at BGN 6 per share, but only 1,500, out of 784,000 were sold. In case the Privatisation Agency (PA) does not reduce the price, there might be no investors willing to buy, brokers say. Weak interest is expected for the Kardzhali-based lead and zinc smelter. Majority owners of Rila Hotel and Riviera are likely to bid for the residual packages