Stock Trading Quality Control & Assurance 2 — Questions and Answers
Question 1: A trader notices their algorithm repeatedly generates signals 30 seconds after the optimal entry point. What quality control step should be taken first?
- Increase position size to compensate
- Conduct latency profiling to identify the bottleneck (Correct answer)
- Switch to a different broker immediately
- Disable the algorithm and trade manually
Correct answer: Conduct latency profiling to identify the bottleneck
Latency profiling pinpoints where execution delays originate so targeted fixes can be applied.
Question 2: What does a 'fat finger' control in trading systems help prevent?
- Market manipulation
- Accidental entry of orders with extreme size or price errors (Correct answer)
- Unauthorized access to trading accounts
- Excessive commissions from overtrading
Correct answer: Accidental entry of orders with extreme size or price errors
Fat finger controls use pre-trade checks to reject orders that deviate wildly from intended parameters.
Question 3: Which metric best measures the consistency of a trading strategy's returns over time?
- Total net profit
- Standard deviation of returns (Correct answer)
- Number of winning trades
- Maximum single-day gain
Correct answer: Standard deviation of returns
Standard deviation of returns quantifies return variability, directly reflecting strategy consistency.
Question 4: A trading firm uses a 'four-eyes principle' for large orders. What does this quality assurance practice require?
- Two monitors must display the order ticket
- Two separate individuals must review and approve the order (Correct answer)
- Orders must be reviewed four times before submission
- Four risk metrics must be checked simultaneously
Correct answer: Two separate individuals must review and approve the order
The four-eyes principle mandates dual sign-off to reduce errors and prevent unauthorized trades.
Question 5: During a post-trade review, a desk finds fill prices consistently worse than the mid-price at order submission. This most likely indicates a problem with:
- Market volatility
- Execution quality or routing (Correct answer)
- Strategy signal generation
- Risk limit calibration
Correct answer: Execution quality or routing
Consistent adverse fills relative to mid-price point to poor execution quality or suboptimal order routing.
Question 6: What is the purpose of a 'kill switch' in an electronic trading system?
- To reboot trading servers during low-volume hours
- To immediately halt all trading activity in an emergency (Correct answer)
- To cancel only losing positions automatically
- To switch between algorithmic and manual trading modes
Correct answer: To immediately halt all trading activity in an emergency
A kill switch instantly stops all order flow to contain runaway algorithms or system failures.
Question 7: A firm's backtested strategy shows a Sharpe ratio of 2.8, but live trading produces a Sharpe of 0.6. Which quality control process would best investigate this gap?
- Increase leverage to boost live returns
- Walk-forward analysis and out-of-sample testing (Correct answer)
- Rerun the backtest with different date ranges
- Report the issue to the SEC
Correct answer: Walk-forward analysis and out-of-sample testing
Walk-forward and out-of-sample testing reveal whether backtest results are robust or the product of overfitting.
Stock Trading Quality Control & Assurance 2
A trader notices their algorithm repeatedly generates signals 30 seconds after the optimal entry point.
What quality control step should be taken first?