(Bloomberg) — US stock markets will close Jan. 9, in observance of a national day of mourning for former President Jimmy Carter.Most Read from BloombergMigrant Crisis Pushed US Homelessness to Record High in 2024The New York Stock Exchange, Nasdaq Inc.’s US equities exchanges and Cboe Global Markets Inc. will shut, the companies said. CME Group Inc., operator of US-based equity and interest-rates markets, had not yet commented on its plans.The closures are part of a long-standing American tradi