Notable Wednesday Option Activity: AAPL, STOK, Z

Stoke Therapeutics (STOK) and Zillow Group (Z) recently experienced notable options trading activity, significantly exceeding their average daily share volumes. STOK saw 10,035 options contracts traded, representing 107.3% of its average daily share volume, with a high concentration in the September 2025 $15 call options. Concurrently, Zillow Group recorded 25,369 options contracts, 102.1% of its average daily share volume, driven by significant interest in the September 2025 $87.50 put options, potentially signaling distinct long-term directional biases among options traders for each stock.

Analysis

Stoke Therapeutics (STOK) and Zillow Group (Z) have both registered significant options market activity, with total options volumes representing 107.3% and 102.1% of their respective average daily share trading volumes. This elevated activity points to heightened investor positioning and potential for future volatility. For STOK, the interest is highly concentrated in bullish bets, with 5,016 contracts of the September 2025 $15 strike call options traded, accounting for roughly half of the day's total options volume of 10,035 contracts. This long-dated call buying indicates a strong, specific conviction that the stock will appreciate significantly above $15 over the next year. Conversely, Zillow Group experienced a surge in bearish or hedging activity, with 5,453 contracts traded for the September 2025 $87.50 strike put option. This notable put volume, out of a total 25,369 contracts, suggests that a segment of the market is positioning for a substantial price decline below $87.50 in the long term.

Key Decisions for Investors

• Investors should investigate the fundamental catalysts for Stoke Therapeutics, as the concentrated, long-dated call buying at the $15 strike signals a strong bullish conviction from a segment of the options market.
• For Zillow Group, the significant volume in long-term put options at the $87.50 strike should be interpreted as a cautionary signal, prompting a review of downside risks or consideration of hedging strategies for existing long positions.
• The unusual options volume in both STOK and Z suggests that implied volatility may be on the rise, and investors should monitor these stocks for potential price swings and follow-through volume in the underlying shares.