Updated with news that GM will trade again on Wednesday.Shares in old General Motors do have value, sort of, to somebody. If you are a shareholder in old General Motors -- whose symbol was GM before becoming GMGMQ in bankruptcy -- which is now called Motors Liquidation Co., don't get your hopes up. The shares are still essentially worthless. In fact, Finra, the financial industry regulatory authority, says it will allow trading in the shares to restart on Wednesday, after halting trading on Friday, but the agency restated General Motors' warning that the shares have no value. They will trade under a new symbol, MTLQQ. The activity in the shares is masking an unusual bankruptcy court maneuver involving the shares' relationship to GM's effort to ensure that new GM obtains the $16 billion net operating loss associated with old GM.