New York (CNN Business) Investors apparently haven't left themselves too many Post-its to remind themselves to buy 3M stock. Shares of 3M are down nearly 12% this year.

Walgreens WBA 3M MMM That makes the St. Paul, Minnesota-based conglomerate, which also makes ACE bandages, Scotch tape and a variety of industrial products, one of the "dogs" of the Dow Jones Industrial Average. It's the second-worst-performing stock in the Dow this year.is the only company that has dropped more than

3M warned in October 2018 that trade tension with China would be a problem, and it's only gotten worse since then.

In April, the company's stock plunged 13% — its worst one-day fall in 30 years — after the company said the combination of weakness in China and a strong US dollar was wreaking havoc on sales and earnings. 3M lowered its outlook at the time and said it was cutting 2,000 jobs.

But in late July, when the company reported second quarter results, 3M executives said they were hopeful business conditions were finally starting to turn around.

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