This is CNBC's Morning Squawk newsletter. Subscribe here to receive future editions in your inbox.Here are five key things investors need to know to start the trading day:1. Witching hourA trader works at his desk on the floor of the New York Stock Exchange (NYSE) after the opening bell in New York on December 3, 2025. Timothy A. Clary | Afp | Getty ImagesWall Street could be in for a wild trading day when options on four types of securities expire: index options, single stock options, index futures and ind ...

Traders work on the floor of the New York Stock Exchange (NYSE) at the opening bell in New York on December 16, 2025.Wall Street could be in for a volatile end to the week as traders brace for what Goldman Sachs says will be the largest options expiration on record.More than $7.1 trillion in notional options exposure is set to expire this Friday, according to Goldman, including roughly $5 trillion tied to the S&P 500 index and $880 billion linked to single stocks. December options expirations are typically ...

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