I think there's good reason to believe industrial giant 3M's (NYSE: MMM) full-year sales outlook could be under significant pressure, and management could, yet again, miss its full-year expectations based on its initial guidance. There is an investment case for buying the stock, but it makes sense to weigh the risks and rewards before investing money. 

There are three interconnected reasons why investors need to be cautious about the matter:

The cut in full-year sales expectations (although not a cut in guidance because management said it would likely come in at the lower end of the range) is disappointing, particularly as 3M's management doesn't have a good track record of meeting its sales guidance. 

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Source Fool.com