That means they incur the risk that a sudden price plunge will cause them to offload their inventory at a loss , just as greengrocers suffer when they try to flog pumpkins after halloween .

也就是说，如果价格突然下跌会导致他们不计成本低抛掉清单上的证券，这就如同菜贩们在万圣节后忍痛砸碎南瓜一样。