Puma Biotechnology Inc. shares (NASDAQ:PBYI) fell 8.1 percent to $35.64 on Monday after a European licensing deal for its breast cancer drug, Nerlynx (neratinib), led to what analysts interpreted as disappointment among investors anticipating a sale of the company or asset instead. Licensor Pierre Fabre will pay Puma $60 million up front and up to $345 million in regulatory and commercial milestone payments for rights to develop and commercialize Nerlynx in Europe and parts of Africa. In addition, Puma will receive "significant double-digit royalties," it said. The product's first EU availability is expected in Germany later this year.