under or fairly valued stocks

Re: under or fairly valued stocks

TEVA acquired generic arm of Allergan for 40 billion. When I saw the news, it was up 10 pct today. Didn’t think twice. Just sold it at 68.62. Well, it finished at 72. No regrets. The return was pretty good. Not to mention the approx 3m5 pct div yield. Per this post, return shoukd have been 53 pct. But overall return was higher. At around 68 pct. In I think 2.5 years. Don’t know why.