MOS call volume above normal and directionally bullish
Unusually large, concentrated buying of long-dated MOS calls dominated activity Wednesday, with 2,766 contracts and roughly $1.37M of premium in a single Dec-2026 strike and heavy same-side, ask-priced execution.
Options activity in Mosaic Co. (MOS) on June 3 shows a pronounced, quality-appearing tilt toward long-dated call buying. Total options volume was 3,004 contracts, about 4.76x the typical daily level, and at the 100th percentile for both volume and premium. Calls accounted for 2,766 contracts and $1,371,693 of premium versus just 238 puts and $65,450 of put premium, producing a put/call volume ratio of 0.09 and a put/call premium ratio of 0.05.
The flow is concentrated in one contract: the Dec 18, 2026 21.0 strike call, which recorded all 2,766 call contracts and the $1,371,693 of call premium. Same-side tape metrics reinforce the directional read — 34 of 35 recorded trades were on the same side, with the same single contract involved, total same-side premium of $1,371,693, a maximum individual trade premium of $122,376, and an average absolute delta of 0.68. Execution characteristics point to aggressive buying: the ask-side premium ratio is high (0.749 overall and 0.785 on the same-side tape) and sweep/block premium activity is elevated (sweep/block premium ratio 1.298 overall, 0.977 on the same-side), signaling significant take-of-ask and block-size executions rather than passive, bid-side fills.
Other liquidity and volatility context looks reasonable for interpreting the flow. Average spread on the trades was about 3.3%, with same-side average spread 3.19%, suggesting the contract was tradeable without outsized slippage. Implied volatility is elevated: average IV for the active calls is 53.38% and the 30-day IV is 49.87% with an IV percentile of 64.6. The expected move over the next 30 days is approximately $1.20 (5.05%), while the underlying stock was trading at $23.68 on the snapshot and had traded about 1.56 million shares.
The structure — very large premium concentrated in a single ITM, long-dated call, heavy ask-side execution, strong same-side tape and high percentile readings for volume and premium — makes this a high-quality, directionally bullish signal. The options expire Dec. 18, 2026 (about 198 days to expiry in the record), and the company’s next scheduled earnings date in the snapshot is Aug. 4, 2026. As with any options flow, the trades reflect positions and hedges rather than guaranteed future stock moves and carry the risks inherent to long-dated option exposure.