Citigroup Sees Unusual Options Activity and $223M Block Trade After Hours

Citigroup Inc. experienced a surge of unusual options activity during Friday's trading session on August 21, culminating in a $223 million block trade after the market close.

After-Hours Block Trade

At 4:56 PM ET on Friday, market data captured a large order for Citigroup shares.

The block trade comprised 1.7 million shares, executed at a price directly above the ask price of $131.62, settling at $131.65 per share, for a total transaction value of approximately $223.8 million.

Aggressive Far-Dated Call Sweeps

Prior to the after-hours trade, a series of heavy call sweeps occurred throughout the trading day. Institutional buyers demonstrated strong long-term conviction on multi-year-dated call options:

January 2027 Calls: A single sweep generated $981,000 in volume on in-the-money calls with a $77.50 strike price expiring January 15, 2027.

December 2026 Calls: A large order spent $814,625 on in-the-money calls with a $70 strike price expiring December 18, 2026.

December 2028 Calls: Buyers hit out-of-the-money calls with a $140 strike price, including a transaction valued at $403,837 expiring December 15, 2028.

Low Short Interest

The aggressive buying points to genuine institutional accumulation rather than a short squeeze.

Exchange data from the July 31 settlement date shows short interest in Citigroup at just 1.47% of outstanding shares, with 24,686,076 shares shorted and a days-to-cover ratio of 2.14.

Recent Strategic Expansion Bullish sentiment was further supported by key strategic developments announced by the bank this month. On August 14, Citigroup participated in a $4.6 billion joint loan for U.S.-Japan energy infrastructure. Citigroup's Japan Country Head and Banking Head, Robert Nakamura, stated, "Energy infrastructure investment supports growth driven by artificial intelligence and digitalization."

On August 18, the bank launched Custody+, a real-time suite leveraging "single-event processing technology" that handles over 80% of total event volume in real time. Amit Agarwal, Head of Custody at Citigroup Investor Services, said the platform aims to help clients transition "from legacy to next-generation architecture."

Finally, on August 21, Citigroup became the depositary bank for Agilyx ASA's new American Depositary Receipt program, trading on the OTC market under the ticker "AGYXY."

How is Citigroup Performing in 2026? C shares are up 12.82% year-to-date, up 42.19% over the past year, and up 13.49% over the past six months. Friday's close was up 1.53% to $131.65 per share, with Monday's pre-market trading up 0.17%. Edge stock rankings show BABA maintaining strong long-term price trends, but with weaker short-term and mid-term trends and moderate growth scores.