McDonald's breakfast turns shares into hot cakes

McDonald's Egg McMuffin
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After seven straight quarters of negative U.S. same-store sales, investors are expecting a big turnaround for McDonald's, with sentiment decidedly turning the day after the chain announced all-day breakfast Sept. 1.

They've already turned around the shares. After being down as much as 7 percent year to date as recently as August, the stock is up 10 percent this year compared to the market's 2 percent decline. Shares of the largest restaurant in the world trailed the S&P 500 by a total of 70 percent from 2011 to 2014.

The stock is up double digits since the breakfast announcement at the start of last month.

Analysts cite the potential power of additional sales leverage from the full-day breakfast service.

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