Pearl Options

How MIAX Pearl Options Works

The operation of MIAX Pearl revolves around two fundamental pillars: its execution algorithm and its pricing structure. These components work together to create a market environment that rewards speed and transparency. The execution algorithm used by Pearl is known as "Price-Time Priority." This is a straightforward and egalitarian model: orders are ranked first by the price they are offering. If multiple orders are sitting at the same best price, the order that arrived at the exchange first is given priority for the fill. This differs from the "Pro-Rata" model used by many other exchanges, where fills are allocated based on the size of the order rather than the time of arrival. The Price-Time model encourages traders to be the first to update their quotes, ensuring that Pearl's order book remains extremely competitive and reactive to new market information. Complementing this is the "Maker-Taker" fee model. In this system, Pearl offers a financial rebate to "makers"—those who place limit orders that add liquidity to the book. Conversely, it charges a fee to "takers"—those whose orders "take" liquidity by executing against existing resting orders. This structure is highly attractive to high-frequency trading (HFT) firms and electronic market makers. By earning a small rebate on every contract they provide, these firms can afford to offer tighter spreads than they might on a traditional fee-based exchange. This creates a virtuous cycle where high rebates attract more liquidity providers, which in turn attracts more order flow from brokers looking for the best price for their clients.

Important Considerations for Pearl Options

For traders and firms considering Pearl as an execution venue, several key factors must be considered. First and foremost is the impact of the maker-taker model on total transaction costs. While the exchange provides attractive rebates, the "taker fees" can be significant for those executing large market orders. Institutional traders must use sophisticated Smart Order Routers (SORs) to weigh the benefit of a slightly better price on Pearl against the cost of the taker fee. For many, the speed of Pearl's matching engine—which boasts microsecond latency—justifies the cost, especially in fast-moving markets where being filled instantly is more important than the fee itself. Another consideration is the specific range of products listed. While Pearl lists thousands of equity and ETF options, it is primarily a "Penny Program" exchange. This means it is a major hub for the most actively traded names like Apple, Tesla, and the SPDR S&P 500 ETF (SPY), where spreads are measured in pennies rather than nickels. However, for less liquid, "deep out-of-the-money" options or niche small-cap names, other exchanges with different incentive structures might offer better depth. Finally, traders should be aware of Pearl's role in "complex orders." Pearl features a specialized Complex Order Book that allows for the execution of multi-leg strategies—like vertical spreads or iron condors—as a single package, ensuring that traders aren't "legged out" of their positions due to price movements between the execution of individual contracts.

How It Fits into the Market

Retail traders rarely choose which exchange their order goes to directly; instead, their broker's automated systems make that decision in real-time. However, MIAX Pearl is significant to the retail investor because its aggressive rebate structure forces other exchanges to remain competitive. If Pearl offers a high rebate for posting a quote on a popular option, market makers are incentivized to post tighter spreads there to capture that rebate. Because of the NBBO rules, other exchanges must then match those tighter spreads or risk losing all their order flow. In this way, MIAX Pearl acts as a catalyst for price improvement across the entire US options market, even for investors who have never heard of the exchange.

Exchange Comparison

Comparison of MIAX Pearl with other major US exchange models: