Why does Nyan.A need to be approved?  You previously said everyone would get their full 1 BTC back eventually.  So just dividend out until they've received it back - with a forced buyback on the last one.

If anyone wants to sell to you cheaper it can be done by trade.

I don't actually disapprove of it being listed - IF contract clearly states your commitment (if it still exists) to pay back the full 1 BTC, gives some sort of schedule (to whatever extent it can) and there's a link to some post that very clearly says what has been paid back so far, what (if any) assets remain, what funds are owed by Nyan and/or CPA and what remains to be paid back.

Similarly I don't object to BMF being listed once the contract is updated to reflect that it's closing, any commitments you've made about value (I recall one about a guaranteed minimum) are clearly in the contract and there's somewhere a clear list of what assets it had at closure, which have been paid for and which still have funds owed (not sure whether all the mining gear has been paid for - seem to recall you saying  2 had been refunded).  Without ANY information on what current assets it has noone can possibly place a value on it and it has no business being listed.

As far as I know (correct me if wrong) nyan.b/c and nyan/cpa all have zero assets (or - in the case of CPA and nyan - have liabilities exceeding assets).  As they have absolutely zero value why should they be listed?  Anyone who buys them is paying something for nothing.  Any assets CPA has should by now have been paid to nyan.a on liquidation.  Any assets Nyan has should by now have been paid to either nyan.a or nyan.b (there's an issue on that which means nyan probbaly should hold back payment until it sees whether CPA clears nyan.a's capital repayment).

I can't see ANY reason to try to let the market find a price for things which have no value - that's a charity not an investment.  

With nyan.a/BMF there's no reason why they shouldn't be tradable once the contract reflects accurately the situation and sufficient information is provided to allow the market to properly assess their value.  Though I don't approve of blackmail attempts by threatening to withhold funds due to investors until you're allowed to trade.  If I were more cynical then I may even guess you just want to try to low-ball investors at below value by failing to provide information letting them realise what assets remain.

EDIT: Removed comments about SILVER/TU.SILVER as not relevant to thread.