Pedestrians are reflected in the glass of a window showing share prices at the Tokyo Stock Exchange on Dec. 17. At least five business stories had major impacts in 2015. They involved everything from crashing oil prices to merging beer companies. Yoshikazu Tsuno/AFP/Getty Images hide caption

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A police officer keeps watch outside the Federal Reserve headquarters in Washington, D.C., where policymakers weighed whether to boost interest rates. Kevin Lamarque/Reuters/Landov hide caption

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Federal Reserve Chair Janet Yellen, speaking at a news conference in Washington on Thursday, said the U.S. economy has been performing well but the global outlook is more uncertain. Jacquelyn Martin/AP hide caption

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Federal Reserve Chair Janet Yellen and other policymakers will meet in Washington, D.C., this week to weigh a possible increase in interest rates. Manuel Balce Ceneta/AP hide caption

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Federal Reserve Chairman Ben Bernanke talks to educators Aug. 7 in Washington, D.C. At their most recent meeting, many Fed members backed action to boost the economy. Manuel Balce Ceneta/AP hide caption

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