Investors with significant funds have taken a bullish position in Charles River (NYSE:CRL), a development that retail traders should be aware of. This was brought to our attention today through our monitoring of publicly accessible options data at Benzinga. The exact nature of these investors remains a mystery, but such a major move in CRL usually indicates foreknowledge of upcoming events. Today, Benzinga’s options scanner identified 9 options transactions for Charles River. This is an unusual occurrence. The sentiment among these large-scale traders is mixed, with 44% being bullish and 44% b…