High-rolling investors have positioned themselves bearish on Coherent (NYSE:COHR), 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 COHR often signals that someone has privileged information. Today, Benzinga’s options scanner spotted 11 options trades for Coherent. This is not a typical pattern. The sentiment among these major traders is split, with 45% bullish and 54% bearish. Among all the options we ident…