That's a $10 word meaning, "the seasonal moving of livestock from one region to another", usually seeking better pasture or weather..
Hmmm, let's apply this to beefers. Beefers move from one group of stocks to another, seeking profits and fees. So beefers practice "transhumance" for stocks instead of livestock!
Here's a sentence. "The unpredictable nature of beefer transhumance of their stocks makes time diversification and dip buying a profitable endeavor for long term investors."
Hehehe. The study of the behavior of beefers is essential for one's investing health! ;-)