Noteworthy Monday Option Activity: MO, IMNM, RSI

Immunome Inc. options saw 6,200 contracts trade (≈620,000 underlying shares), about 53.4% of IMNM’s one‑month average daily volume, with concentration in the Dec. 19, 2025 $25 call (1,653 contracts, ~165,300 shares); Rush Street Interactive options traded 5,715 contracts (≈571,500 shares), about 51% of its one‑month ADTV, driven by the Dec. 19, 2025 $20 call (5,562 contracts, ~556,200 shares). These large, strike‑ and date‑concentrated call flows—each representing over half of recent average daily share turnover—indicate significant directional/speculative positioning or hedging demand that could presage company‑specific catalysts or notable short‑covering activity.

Analysis

Immunome Inc. (IMNM) and Rush Street Interactive (RSI) showed concentrated call-option activity today: IMNM traded 6,200 contracts (~620,000 underlying shares), about 53.4% of its one‑month ADTV of 1.2M shares, led by the Dec. 19, 2025 $25 call with 1,653 contracts (~165,300 shares). RSI traded 5,715 contracts (~571,500 shares), roughly 51% of its one‑month ADTV of 1.1M, dominated by the Dec. 19, 2025 $20 call with 5,562 contracts (~556,200 shares).

The single‑strike, single‑expiration concentration implies directional/speculative positioning or hedging that could presage company‑specific catalysts or short‑covering; the supplied sentiment labels this flow as mildly positive and speculative with modest market impact. Because each flow represents more than half of recent average daily share turnover, dealer delta‑hedging or aggressive buy‑to‑open activity could move the underlying shares in the near term.

Conclusions are constrained by absence of buy/sell‑to‑open and open‑interest change data: large volume can also reflect spreads or volatility arbitrage rather than outright bullish bets, and the profitability of these trades will depend on implied volatility dynamics. Investors should therefore monitor open interest, IV shifts, intraday price/volume, and any material news ahead of the Dec. 19, 2025 expiration before taking significant directional positions.

Key Decisions for Investors

• Monitor open interest, intraday and daily price/volume for IMNM and RSI and watch implied volatility and any corporate announcements before sizing new positions
• Avoid initiating large directional trades solely on these flows; if participating, use defined‑risk structures or staged entries to limit downside
• If a sustained rally with IV compression and supporting fundamental or corporate catalysts emerges, consider adding exposure; otherwise hedge or trim positions if flows reverse or IV spikes ahead of the Dec. 19, 2025 expiration