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Trading Through News and Halts

Adapt live orders through news and trading pauses, plan a safe restart, and review execution quality.

These prompts are original practice. They are not questions from a named employer or a live hiring loop.

A scheduled release

A client buy has 100,000 shares left at 9:50. Its hard limit is $25.00. The client wants to avoid trading from 9:59 through the verified public release and allows a later restart. Current market is $24.90/$24.95. There are 15,000 shares resting across two routes.

  1. 1.What should the desk do before the pause starts?

  2. 2.If 4,000 shares fill before cancels are effective, what remains?

  3. 3.How many of the original resting shares then remain to be accounted for?

  4. 4.At 9:59 an order's cancel is still pending. What state should the desk report?

  5. 5.The release is delayed. What governs restart?

  6. 6.The post-event offer is $25.20. Can the desk cross it?

  7. 7.What if the client asks for a faster plan but leaves $25 unchanged?

  8. 8.What should the first client update include?

  9. 9.Which comparison helps evaluate the pause afterward?

  10. 10.What should be agreed for the next release?

A sudden halt

A sell parent started at 80,000 shares and filled 32,000 before a halt. There are 10,000 shares working at one venue and 8,000 awaiting cancel at another. Under the venue terms in this case, resting orders may survive the halt.

  1. 11.What is the parent residual after confirmed fills?

  2. 12.How much of that residual is uncommitted if both old children may still fill?

  3. 13.What should the desk verify before rerouting?

  4. 14.If the 8,000 cancel confirms with no fill, how much becomes uncommitted?

  5. 15.If the remaining 10,000 order later fills entirely, what is the new parent residual?

  6. 16.Why notify the client about surviving orders?

  7. 17.What should the trader verify about the halt status?

  8. 18.If the client cancels the parent during the halt, what is needed?

  9. 19.What if a fill report arrives late with a pre-halt execution time?

  10. 20.What release gate protects against overfill?

Reopening auction

A buyer has 40,000 shares left with a $30.10 hard cap. The venue indicates a $30.20 auction price and 80,000 paired shares. Its plan limits the auction child to 15% of currently estimated paired volume. The auction price and size can change.

  1. 21.What maximum child size does the plan permit at the initial paired-volume indication?

  2. 22.Would a $30.10 buy limit fill if the indicated $30.20 becomes the final price?

  3. 23.If paired volume rises to 120,000 and the limit is eligible, what planned cap follows?

  4. 24.Why avoid counting paired volume as guaranteed fills?

  5. 25.What if the venue's ordinary cutoff has passed?

  6. 26.What should the desk confirm before attempting to move an auction child elsewhere?

  7. 27.The auction fills 9,000 at the cap. What remains for the parent?

  8. 28.The order benchmark is the official reopening price. What can an auction fill at that price demonstrate?

  9. 29.What should the residual plan specify?

  10. 30.Why compare indicative and final paired volume in the review?

Trading after a sharp release

A sell has 60,000 shares remaining. Normal daily volume pace was 10,000 shares per minute. After news, eligible volume falls to 4,000 per minute. The client caps participation at 15% and wants completion in 30 minutes. Ignore any auction or blocks.

  1. 31.What fill rate in shares per minute fits the cap at the new pace?

  2. 32.How many shares can trade by the deadline at that pace?

  3. 33.What projected residual remains?

  4. 34.What participation rate would be needed to complete within 30 minutes at 4,000 per minute?

  5. 35.Can the desk raise participation to 50% on its own under a hard 15% cap?

  6. 36.What should be presented to the client?

  7. 37.If market volume recovers to 8,000 per minute for all 30 minutes, what capacity follows at 15%?

  8. 38.Why compare spread and depth as well as total volume?

  9. 39.What alternative could improve completion without increasing participation if permitted and feasible?

  10. 40.What should be recorded after the client changes the deadline?

Paused hedge leg

A basket has bought $5m of a sector stock. Its paired sale is halted after $2m fills. Assume dollar matching is the stated measure and the desk permits at most $3.5m of temporary net long exposure. An approved ETF hedge can reduce this exposure dollar for dollar in the model.

  1. 41.What temporary net exposure is already confirmed?

  2. 42.How much further buy capacity remains if there are no other live orders?

  3. 43.What if a $0.8m buy is already live and may fill?

  4. 44.What is a sensible immediate step on the leading leg?

  5. 45.If the desk shorts $1m of approved ETF exposure and there are no new cash fills, what modeled net exposure remains?

  6. 46.What risk remains despite the modeled offset?

  7. 47.When the stock sale resumes and fills, what should happen to the ETF hedge?

  8. 48.What must be verified before resuming the full basket?

  9. 49.How should the client review explain a hedge loss during a favorable cash move?

  10. 50.What planning change could reduce the next mismatch?

Quote versus depth

After news, a buyer needs 5,000 shares before a short deadline. The book offers 1,000 at $20.00, 2,000 at $20.08, and 2,000 at $20.20. The client's hard cap is $20.10. Ignore fees and assume these quotes remain available until hit.

  1. 51.How many shares are eligible now?

  2. 52.What is the average price of those eligible shares?

  3. 53.What residual remains after those fills?

  4. 54.If the client authorizes $20.20 and all levels remain firm, what full-size average follows?

  5. 55.How much extra does the last level cost versus buying those 2,000 at the top offer?

  6. 56.What does the top offer alone omit?

  7. 57.If quotes are merely indicative, what should the desk check?

  8. 58.If the client refuses a higher cap, what should the desk communicate?

  9. 59.Which comparison measures price paid above the pre-news decision point?

  10. 60.What should be measured separately from realized fill price?

Choosing when to wait

An urgent buy may be worked immediately or delayed five minutes after news. Immediate execution is expected to cost $9,000. Waiting is expected to cut execution cost to $4,000 but add $7,000 of timing cost, all on the same basis. Both plans are permitted.

  1. 61.What is expected all-in cost of waiting?

  2. 62.Which plan has the lower expected cost under these estimates?

  3. 63.What timing cost makes the two plans break even?

  4. 64.If expected timing cost falls to $3,000, what is the advantage of waiting?

  5. 65.What uncertainty should be highlighted to the client?

  6. 66.What could make immediate execution infeasible despite lower expected cost?

  7. 67.Why specify an end to the wait?

  8. 68.Which observation supports revising the plan during the wait?

  9. 69.How should the desk compare the eventual result with the alternative?

  10. 70.What should be retained for future event planning?

Route recovery

A venue stops acknowledging orders during a headline. The desk stops new entries there. Two orders remain unresolved. A fallback venue is healthy and permitted. The client wants controlled resumption after reconciliation.

  1. 71.What should happen to unresolved orders in exposure calculations?

  2. 72.Which evidence resolves order state?

  3. 73.Can the fallback take the entire remaining parent while both old orders may fill?

  4. 74.What should be checked when the primary connection returns?

  5. 75.What is a reasonable first step after all readiness checks pass?

  6. 76.What should stop the ramp?

  7. 77.What update should the client receive while state is unresolved?

  8. 78.Why preserve the decision timestamps?

  9. 79.What if the fallback shares the primary's failed dependency?

  10. 80.Which measure belongs in the final report besides price?

Reviewing the result

A 100,000-share buy has a $40 decision benchmark. It fills 70,000 at $40.12 before the halt and 20,000 at $40.30 after reopening. The final 10,000 is marked at $40.50 for opportunity cost. Fees total $900.

  1. 81.What is the pre-halt price cost?

  2. 82.What is the post-reopen fill price cost?

  3. 83.What opportunity cost applies to the residual?

  4. 84.What is total shortfall including fees?

  5. 85.What completion rate should be reported?

  6. 86.What is average price on the executed shares?

  7. 87.Why report pre-halt and reopened fills separately?

  8. 88.Does the $5,000 residual opportunity cost represent a commission?

  9. 89.What evidence helps assess whether the desk could have done better?

  10. 90.What follow-up is useful if most of the cost arose after reopening?

Client constraints after news

A sell order has a hard floor of $18 and 24,000 shares remaining. The best verified bid after news is $17.80. The client permits canceling the residual or waiting, and only its authorized delegate may change the price floor.

  1. 91.Can the desk hit the $17.80 bid under current terms?

  2. 92.What price move would bring that bid to the floor?

  3. 93.What should the desk do if the client contact cannot be reached?

  4. 94.If 6,000 shares become available at $18 and fill, what remains?

  5. 95.If the delegate authorizes $17.75, what should the desk verify before using it?

  6. 96.At $17.80 for the full 24,000, what proceeds would result before fees if authorized and available?

  7. 97.What is the dollar difference versus selling all 24,000 at $18?

  8. 98.Why not promise a fill at $17.80 when asking for a lower floor?

  9. 99.What should a next-order plan specify if another release is expected?

  10. 100.Which result should the review show if the order remains unfinished?

  11. 101.What should be checked after the parent is marked complete or canceled?