Learn how Series 23 tests order entry, routing, best execution, market making, quotation integrity, Regulation NMS, trade comparison, booking, settlement, buy-ins, close-outs, CAT, TRACE, and trade-reporting controls.
Trading and market making is one of the two largest Series 23 functions because it is where the principal-upgrade logic becomes most obvious. A sales supervisor may know the customer side of a trade, but Series 23 tests whether the principal can supervise routing, execution quality, quotation integrity, booking, reporting, settlement, and desk-level control over market conduct.
The strongest answers usually begin by asking what trading-control process failed: routing, quotation, booking, reporting, or post-trade exception handling.
| Item | What matters here |
|---|---|
| Weight | 28% |
| Main skill | identify the trading or market-structure control that the principal should enforce |
| Typical trap | treating the stem like a trader or rep question instead of a desk-supervision question |
| Strongest first instinct | ask what order, quote, report, or settlement process should have prevented the issue |
| Section | Main exam angle |
|---|---|
| Order entry, routing, and best execution | routing and execution quality |
| Market making, quotation integrity, Regulation NMS, and trading restrictions | quote and market-structure controls |
| Trade comparison, booking, allocation, and clearance controls | post-trade accuracy |
| Trade confirmations, settlement cycle, and delivery requirements | customer and settlement evidence |
| Reclamations, rejections, buy-ins, and close-out procedures | exception handling |
| Trade reporting facilities, CAT, TRACE, penny stock, and reporting corrections | regulatory reporting controls |
Series 23 is testing whether you can supervise a trading business line rather than just understand market terms. Strong answers identify the control architecture around the order and the report. Weak answers focus on what the trader wanted to do and ignore whether the desk and principal process supported it properly.
This section tests whether the principal understands how order-handling choices affect execution quality and supervision. Best-execution questions often reward candidates who think about process discipline rather than after-the-fact price defense.
These questions test whether the desk’s displayed activity and restrictions are being supervised properly. The principal should treat quotation integrity and trading restrictions as core market-integrity controls.
This section is about the quality of post-trade handling. A trade that was entered correctly can still become a supervisory problem if booking or allocation is weak.
The exam wants the principal to know whether the firm’s customer and settlement evidence is accurate and timely. These are not just operations questions because poor handling can signal supervision gaps.
Exception handling is where weak trading-control environments show up. The stronger answer usually prioritizes controlled resolution and documentation rather than improvisation.
Reporting questions are often really surveillance questions. The principal should know that a reporting error, delay, or correction issue can reveal a broader desk-control weakness.
| If the vignette shows… | Stronger implication |
|---|---|
| order routed or handled without clear quality control | best-execution issue |
| quote or market-making conduct looks irregular | quotation-integrity or restriction issue |
| trade allocated or booked poorly | post-trade control issue |
| settlement break or buy-in event | exception-handling issue |
| reporting correction or late reporting | CAT/TRACE/reporting-control issue |
A desk repeatedly fixes trade-reporting errors only after receiving outside inquiries, but internal exception review has not been strengthened and the same booking mistakes keep appearing. What is the strongest principal conclusion?
Answer: B
Series 23 trading questions often reward pattern recognition. Repeated reporting corrections usually point to a wider desk-control failure.