Metrics question
You are tasked with the job of increasing the revenue for Amex Credit card. Build an end-to-end pipeline whilst delivering value.
- American Express
- Metrics
- Hard
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What this question tests
Tests building an end-to-end revenue growth plan for a financial product, requiring a structured pipeline from opportunity identification through measurement.
How to approach it
- Break Amex Credit Card revenue into its components: interchange fees from spend volume, interest income from revolving balances, and annual card fees, since the growth lever differs by source.
- Segment cardholders: high-spend, pay-in-full users (interchange-driven revenue) versus revolving-balance users (interest-driven revenue), since strategies differ per segment.
- Identify the highest-leverage, brand-consistent lever: growing spend volume among existing high-spend cardholders through targeted category rewards, since Amex's brand is built on premium rewards, not aggressive interest-rate tactics.
- Design the pipeline: identify underused spend categories per cardholder from transaction data, target personalized limited-time bonus rewards in those categories, and measure incremental spend lift.
- Add a guardrail: reward cost per incremental dollar of spend must stay below the interchange revenue it generates, protecting margin.
- Define success as net revenue growth (interchange plus fees minus reward cost) and cardholder retention, not spend volume alone.
What a strong answer includes
- Breaks revenue into interchange, interest, and fees instead of treating revenue as one number to grow generically.
- Chooses a lever consistent with Amex's actual brand position, premium rewards-driven spend growth, rather than a generic interest-rate tactic.
- Uses illustrative numbers as assumptions: assume a targeted rewards campaign lifts spend 8% among the targeted segment, with reward cost staying under the interchange it generates.
- Adds an explicit margin guardrail, ensuring reward cost doesn't outpace the revenue the campaign generates.
Common mistakes
- Proposing revenue growth through higher interest rates or fees, which doesn't match Amex's premium, low-friction brand positioning.
- Treating revenue as a single lever instead of breaking it into interchange, interest and fees.
- Not adding a margin guardrail, risking a campaign that grows spend but costs more than it earns.
Likely follow-up questions
- How would you personalize the reward categories per cardholder?
- What's the risk of reward fatigue if this runs continuously?
- How would you measure incrementality versus spend that would have happened anyway?
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Learn the skill behind it
Chapters of the AI PM course that teach what this question tests.
- Chapter 9: Prove it paid off: outcomes, economics, and pricing
- Chapter 2: Data fluency: SQL, logs, and reading the truth yourself
- Chapter 14: Get the job: the AI PM interview loop