I think it's very likely just a generic company "getting in line" to be first for exclusivity when the patent finally expires.
Since Hatch-Waxman was modified in 2003, this ploy does not work unless it induces a favorable settlement with the branded-drug company (BMY in this instance).
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”