As I’ve noted in a series of posts (here’s the most recent), there’s an anomaly in the pricing of Citigroup securities. Several issues of Citi’s preferred stock are scheduled to convert into common by the end of the month. Yet the common stock has been trading at a significant premium to the preferred in recent months. As I type this, for example, the common is trading at roughly a 14% premium to the preferred common, even though the conversion is just a few weeks away.
As best I can tell, the only explanation for this pricing anomaly is that Citigroup common stock is very difficult to sell short. So arbitrageurs can’t bid the spread down to levels that would be normal for such a deal.
This anomaly intrigues me for two reasons. First, it appears to be a blatant rejection of strong versions of the efficient markets hypothesis. However, as I will discuss in a later post, the market for Citigroup securities is actually ruthlessly efficient in many ways. As a result, it’s extremely difficult to profit from the anomaly. Sharp financial types have already bid other prices — most notably those for Citi options — to a level where obvious profit opportunities don’t exist.
Second, the anomaly is a big dangling carrot for big-money types to get creative. Markets always try to find ways around imperfections like the limits on short-selling. So I’ve been wondering what creativity would come out of the woodwork. Well, today I got an answer.
Continue reading “The Citigroup Repo”