MSTR August 400 Call Trades Over 13,000 Contracts—14.7% IV Spike Raises Questions
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Massive Volume: Over 13,000 Contracts Traded in the August 400 Call
MicroStrategy (MSTR) saw unusually active options trading on its August 15, 2025 $400 call contract, with 13,389 contracts changing hands by 1:50 PM. That’s 4.7% of the day’s total option activity, drawing clear attention in a single strike.
This level of volume stands out not just by contract count but also by how it compares to recent open interest: as of the latest data (August 13, 2025 at 7:00 AM EST), open interest on this contract was 10,660, itself up 2,716 contracts from the previous session’s close. With today’s volume surpassing open interest, the stage is set for a potentially significant shift in position once data settles.
| Contract | Volume | % of Total Options | VWAP Price ($) | Open Interest | Open Interest Change |
|---|---|---|---|---|---|
| Aug-15-25 400 Call | 13,389 | 4.7% | 0.62 | 10,660 | +2,716 |
Volatility Spikes: IV Jumps 14.7% Intraday—Is There More Than Meets the Eye?
While price is a key signal, volatility may tell a deeper story. The implied volatility (IV) for the August 400 call surged to 66.4 by early afternoon, up 14.7% from the prior day’s close at 49.2. The IV reached as high as 67.6 intraday—meaning traders are willing to pay up for protection or speculation despite a $19.01 (-4.88%) drop in the stock price to $370.89. Notably, the opening trade price on this contract was $1.14, with the price sinking to as low as $0.31 and recently printing at $0.43.
| Last Price | Previous Close | Open Price | High Price | Low Price | VWAP Price | IV Last | IV Prev. Close | IV Change (%) |
|---|---|---|---|---|---|---|---|---|
| 0.43 | 3.15 | 1.14 | 1.99 | 0.31 | 0.62 | 66.4 | 49.2 | +14.7 |
Order Flow Balanced: Large Trades Dominate, But No Clear Opening or Closing Signal
Looking closer at trade direction, the August 400 call option was nearly evenly split: 51% of contracts attributed to large (institutional or professional) trades, versus 49% from smaller, likely retail trades. The breakdown shows 43.9% of the total traded volume classified as bought to open (aggressive buyers), and 56.1% as sold to open—implying a slight tilt towards supply, but not an overwhelming bias in either direction. Whether these represent new bets or exits isn’t certain until tomorrow’s open interest update.
| % Bought | % Sold | % Large/Pro | % Small/Retail |
|---|---|---|---|
| 43.9% | 56.1% | 51% | 49% |
Takeaway: Volatility Premium Points to Uncertainty—Key Levels in Focus for MSTR
The jump in implied volatility and unusually high volume on this $400 strike, even as MSTR trades almost 8% below that level, suggests that market participants see increased odds for significant moves ahead of August expiration. The balanced mix between large and small traders means institutions and retail investors are equally engaged—but whether this is a protective play, speculation, or a volatility strategy remains to be confirmed.
Traders should keep an eye on open interest updates, shifts in implied volatility, and MSTR’s price action around $370 to $400. Elevated IV suggests potential for further price swings, and the substantial trade flow signals this contract could be a battleground for bullish and bearish sentiment alike in the days ahead.
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