Series 23 Trading and Market Making Supervision Guide
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.
Topic snapshot
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
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.
Section-by-section lesson
Order entry, routing, and best execution
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.
Market making, quotation integrity, Regulation NMS, and trading restrictions
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.
Trade comparison, booking, allocation, and clearance 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.
Trade confirmations, settlement cycle, and delivery requirements
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.
Reclamations, rejections, buy-ins, and close-out procedures
Exception handling is where weak trading-control environments show up. The stronger answer usually prioritizes controlled resolution and documentation rather than improvisation.
Trade reporting facilities, CAT, TRACE, penny stock, and reporting corrections
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.
Trading-and-market-making table
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
What stronger answers usually do
think like the principal supervising the desk, not the trader entering the order
connect pre-trade, trade, and post-trade controls together
treat quote integrity and reporting as market-integrity issues
choose the documented, restrictive answer when control facts are incomplete
Sample Exam Question
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?
A. The issue is minor because the firm eventually corrected the reports
B. The desk may have a trading-supervision weakness because recurring reporting errors suggest a broader control problem
C. The issue matters only if a customer confirmation was wrong
D. Reporting corrections are an operations issue, not a principal issue
Answer: B
Series 23 trading questions often reward pattern recognition. Repeated reporting corrections usually point to a wider desk-control failure.
Common traps
answering from trader intent instead of principal oversight
treating booking and reporting as low-value back-office issues
missing the link between quote integrity and market supervision
minimizing repeated exceptions because each one was eventually fixed
Key takeaways
Trading and market making is one of the two heaviest Series 23 blocks.
The principal should supervise routing, quoting, booking, reporting, settlement, and exception handling as one control chain.
Strong answers focus on desk controls and evidence, not just trading vocabulary.
Study order entry, routing, and best execution (4.1) for the FINRA Series 23 General Securities Principal Sales Supervisor Module with learning objectives, supervision logic, and exam traps.
Study market making, quotation integrity, regulation nms, and trading restrictions (4.1) for the FINRA Series 23 General Securities Principal Sales Supervisor Module with learning objectives, supervision logic, and exam traps.
Study trade comparison, booking, allocation, and clearance controls (4.2) for the FINRA Series 23 General Securities Principal Sales Supervisor Module with learning objectives, supervision logic, and exam traps.
Study trade confirmations, settlement cycle, and delivery requirements (4.2) for the FINRA Series 23 General Securities Principal Sales Supervisor Module with learning objectives, supervision logic, and exam traps.
Study reclamations, rejections, buy-ins, and close-out procedures (4.2) for the FINRA Series 23 General Securities Principal Sales Supervisor Module with learning objectives, supervision logic, and exam traps.
Study trade reporting facilities, cat, trace, penny stock, and reporting corrections (4.3) for the FINRA Series 23 General Securities Principal Sales Supervisor Module with learning objectives, supervision logic, and exam traps.