The argentinian is leaving.... reduced upside, perhaps? I am not confident that HT will go up very much more at this point... Perhaps he saw limited upside? And thought that he could do better elsewhere ... bang for the buck kinda thing. The dividend yield at 3% is not bad if your angling for T-bond type returns but this is not a risk free investment alternative!
Or he is getting US cash to invest in devalued Argentina currency: playing the world currencies. I think so. Plus there are other stock bargains in Argentina. After researching him for the last two weeks, I believe he is a savvy investor, doing what he thinks is best for his money (i.e., Hathaway, Icon). I don't think he is leaving HT, just balancing his $. He still owns alot of HT and seems to be involved in its success. BUT I could be wrong... I'm just not reading his sales as a big negative to HT.