Goldman Sachs reinstated coverage of 3M with a Buy rating and $190 price target, implying 20% upside. The firm views 3M as an \"intriguing self-help story\" with improving organic growth and potential upside from liability resolution. The shares are trading at an inexpensive valuation, the analyst tells investors in a research note. Goldman says 3M is one of the more visible self-help opportunities in the multi-industry group.