Mylan decimates the list price of its Copaxone copy. But why?

Mylan decimates the list price of its Copaxone copy. But why?

Source: 
Fierce Pharma
snippet: 

Mylan has slashed its list price on generic Copaxone, and the move has industry watchers scratching their heads.

According to Bernstein analyst Ronny Gal, the company has sunk its sticker to $1,900 per month, well below the $5,000-per-month price it used to sport. And the way Gal’s contacts see it, “under the current system, this change makes no commercial sense.”