High-rolling investors have positioned themselves bullish on Amgen (NASDAQ:AMGN), and it's important for retail traders to take note.\This activity came to our attention today through Benzinga's tracking of publicly available options data. The identities of these investors are uncertain, but such a significant move in AMGN often signals that someone has privileged information.Today, Benzinga's options scanner spotted 8 options trades for Amgen. This is not a typical pattern.The sentiment among these major t ...