 Shares of AMC Preferred Equity Units APE, -12.06 , known as APEs, tumbled 13.3 in midday trading Thursday, as the trading vehicle of AMC Entertainment Holdings Inc.s AMC, -7.22 special dividend headed toward a fifth straight loss and new lows. The APE shares, a nod to investors who turned a movie theater operator into a meme stock, have plunged 36.1 amid a five-day losing streak, and were trading 42.5 below where they closed 6.00 on their first day of trading on Aug. 22. 