I asked because I've never seen a stock 'halted' because of a r/s, or name change. It also says '20 trading days'. I've traded stocks in transition with a D before. I've understood it as the D lets brokers and the market know of a change, and during trading the new stock that retains the old name, until paperwork and things come through and the name and cusip are amended. A placeholder, if you will?