MmO2 ended down 2 1/2p at 47 1/2p, after touching 43 1/2p, on turnover of 223m shares. Mustapha Omar at broker Collins Stewart has described my share of the year as 'worthless in its current form'. He used the firm's unique Quest valuation model, which measures the value of the company's cash flows, rather than its stated profits. 'If they decide to dump the loss-making German business Viag, then the shares would be worth 24p,' Omar said. Closure costs would be offset by flogging its 3.5m subscribers to a rival phone operator.