大だい発はっ会かい

noun

first trading session of the year

Refers specifically to the opening day of trading on Japanese stock exchanges after the New Year holiday. Often involves a ceremony.

• 東とう京きょう証しょう券けん取とり引ひき所じょの大だい発はっ会かいは1月がつ4日かに行おこなわれた。

  The Tokyo Stock Exchange's first trading session of the year was held on January 4th.