Investopedia: 3M Okay On Growth, But Margins A Growing Worry

For a company that trades largely on the basis of being a defensive stock with strong margins, 3M's (NYSE:MMM) repeated margin weakness in the second quarter is starting to become a cause for concern. Moreover, while 3M's growth doesn't look too bad compared to many of its peers, the relative comps are likely to get less favorable and 3M isn't really built to produce growth spurts. Much as I like and respect this company, the shares too look overpriced today and I'm considering selling my own shares.

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http://www.investopedia.com/stock-analysis/072513/3m-okay-growth-margins-growing-worry-mmm-ge-itw-dhr.aspx