$EMC Corp(EMC)$  市场之所以给出这么大价差， 一方面包含了 class V的折价率 ，以及 未来vmware股价的波动，

根据说明书
Tracking stocks have been utilized many times in the past, including by such blue chip companies asThe Walt Disney Company, General Motors, Liberty Media, AT&T and Georgia Pacific, and mostrecently by Fidelity National Financial, Inc. in June 2014. While not as common as certain otherfinancing structures, tracking stocks are not a new structure.

但是google 一下没有找到上述几家公司 class V的折价率，  5-10% 是一般 vote vs non vote 折扣率，就像是 googl vs goog， 从现在的股价看，至少给了25 -35%的折价率；
看来还是要在做做功课，不要这么快上船