Noteworthy Monday Option Activity: CI, RDNT, SOFI

RadNet (RDNT) experienced 3,633 option contracts traded today (≈363,300 underlying shares), amounting to about 42.7% of its one‑month average daily volume, with heavy concentration in the $65 put expiring Dec. 19, 2025 (951 contracts, ≈95,100 shares). SoFi (SOFI) logged 275,855 option contracts (≈27.6 million underlying shares), roughly 41.6% of its one‑month average daily volume, led by 21,016 contracts in the $28 call expiring Dec. 19, 2025 (≈2.1 million shares). The size and strike concentration of these trades—particularly in the same December 19, 2025 expirations—represent notable directional or hedging positioning in both names and could meaningfully influence near‑term options liquidity and price dynamics.

Analysis

RadNet Inc. (RDNT) experienced 3,633 option contracts traded today, representing approximately 363,300 underlying shares or about 42.7% of its one‑month average daily volume of 851,105 shares. Trading concentrated in the $65 put expiring December 19, 2025, with 951 contracts (~95,100 shares), which indicates notable downside protective or bearish positioning in that strike and expiration.

SoFi Technologies Inc. (SOFI) logged 275,855 option contracts (~27.6 million underlying shares), roughly 41.6% of its one‑month ADV of 66.4 million shares, led by 21,016 contracts in the $28 call expiring December 19, 2025 (~2.1 million shares). The concentrated call activity suggests sizeable bullish or speculative positioning into the same December 2025 window for SOFI, consistent with the per‑ticker sentiment outputs (SOFI +0.6, RDNT -0.4).

These flows are large enough (market impact score 0.32) to influence near‑term implied volatility and intraday price dynamics, but the direction depends on whether trades were buyer‑ or seller‑initiated and on changes in open interest (not provided). Investors should watch subsequent underlying price moves, IV shifts around the highlighted strikes/expiration, and any block trade or institutional filings to distinguish hedging from directional speculation.

Key Decisions for Investors

• For RDNT: consider reducing net long exposure or buying targeted put protection around the $65 strike horizon given concentrated put activity and negative sentiment
• For SOFI: consider selective long exposure or call purchases if you have a bullish thesis, but scale in due to size of flow and monitor elevated implied volatility before executing