Principal Inventory and an Illiquid Client Order
A broker-dealer receives a client order to buy 150,000 shares of an illiquid small-cap company. The stock trades about 20,000 shares per day, and the spread is 4%. The client says, 'I need the position today; use your judgement on price.' The firm's principal trading desk owns 80,000 shares at an average cost 12% below the current mid-price and offers the full 150,000 at 2.5% above the mid. Another venue indicates it could source 40,000 shares near the mid but would take several hours and may move the price. The firm's best-execution policy requires consideration of price, cost, speed, likelihood of execution, and market impact, and says client instructions may override elements but not the duty to act in the client's best interests. The sales trader wants to fill the entire order from principal inventory immediately and book the spread as firm profit.
1. Evaluate whether filling the entire order from principal inventory at 2.5% above mid satisfies best execution.
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It is not automatically best execution. The client has expressed a speed preference, and certainty of execution matters for a 150,000-share order that equals about 7.5 days' average volume. However, the client also said 'use your judgement on price', which is not a specific instruction to pay any price. The principal offer at 2.5% above mid is above the 2% half-spread implied by a 4% spread, and the firm would earn a profit on inventory it holds 12% below mid. The alternative of sourcing 40,000 shares near mid may be better on price but slower and uncertain. A proper assessment would compare all-in cost, market impact, likelihood of completion, and the risk of a failed order. The principal fill may be acceptable if it is the best available result after that comparison and is properly documented, but the sales trader cannot simply choose it because it books a spread. The reasoning is that best execution is a process and outcome judgement, not a single price test.
2. How should the sales trader handle the conflict of interest and the client's instruction?
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The sales trader should treat the client's need for same-day execution as a relevant factor, not as a blanket waiver of best execution. The trader should disclose that the firm is acting as principal and that the price includes the firm's spread or markup, if required by the firm's policy or market rules. The trader should obtain an independent reference price, document the alternative venue quote, and consider a combined execution-for example, sourcing 40,000 shares near mid and using principal inventory for the balance-if that produces a better overall result. The client's consent to principal execution should be clear if the firm's policy requires it. The trader must not use the client order simply to offload inventory at an excessive markup. The reasoning is that the conflict is managed by disclosure, price verification, and a documented comparison, not by asserting that speed overrides everything.
3. What order-handling and record-keeping steps should be taken before and after execution?
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Before execution, the firm should time-stamp the order, record the client's instructions, document the available venues and quotes, and record why principal execution or a combined execution was selected. It should check whether the order is subject to any restriction and whether the client has consented to principal trades. After execution, it should record the fill price, size, venue or capacity, any partial fills, and the allocation. It should retain the best-execution comparison and disclose the firm's capacity and charges as required. If the order is filled in stages, the firm should apply a fair allocation policy and avoid cherry-picking. The reasoning is that an ex-post reviewer must be able to see what information was available at the time and why the chosen execution was reasonable for this client.