Today's print edition

The Nikkei 225 stock average broke 55,000 for the first time ever as trading commenced. It crossed 56,000 and 57,000 minutes later, and hit an all-time high of 57,337.07 at 9:22 a.m.googletag.cmd.push(function() { googletag.display('div-gpt-ad-1499653692894-0'); });

The benchmark closed the day up 3.89%. It's now up more than 45% over the past year.

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