Optimize Credit-Card Strategy: Pricing, Limits, and Target Segments
Company: OneMain Financial
Role: Data Scientist
Category: Analytics & Experimentation
Difficulty: medium
Interview Round: Onsite
##### Scenario
Case study – credit-card business optimization
##### Question
Using the provided cost, revenue and risk figures for a new credit-card product, determine the optimal strategy (pricing / credit limit / target segment). Which metrics would you track post-launch to measure success?
##### Hints
Think of acquisition cost, lifetime value, default risk, and churn.
Quick Answer: Evaluates credit-card strategy optimization across APR, credit limits, target segments, risk, and profitability. Strong answers model CLV or NPV, expected credit loss, constraints, validation, and monitoring.
You are evaluating a new credit-card product. You have or will estimate per-segment cost, revenue, and risk inputs such as acquisition cost, APR options, credit-limit options, interchange and rewards rates, servicing and funding costs, default risk, and churn.
Choose an optimal go-to-market strategy across pricing, credit limits, and target segments.
Constraints & Assumptions
Optimize risk-adjusted profitability, not gross revenue alone.
Include regulatory, fairness, risk appetite, and customer-suitability constraints.
Treat APR, credit limit, and target segment as interacting decisions.
If concrete numbers are missing, illustrate with a small numeric example and state assumptions.
Clarifying Questions to Ask Guidance
What customer segments are eligible, and what data is available for underwriting?
What are the APR, fee, reward, and credit-limit choices?
What are the expected PD, LGD, utilization, spend, churn, and acquisition costs by segment?
What constraints exist around regulation, fairness, capital, and adverse selection?
Part 1 - Objective and Unit Economics
Define the objective and the core unit-economics model.
What This Part Should Cover Guidance
Use CLV, NPV, expected profit, or risk-adjusted return as the objective.
Include interest income, interchange, annual fees, rewards, funding cost, servicing, acquisition cost, expected credit loss, and churn.
Explain how utilization and spend connect APR, credit limit, and profitability.
Include discounting and customer lifetime if relevant.
Part 2 - Optimization Choices
Show how you would select APR, initial credit limit, and target segments.
What This Part Should Cover Guidance
Estimate profitability and risk by segment under candidate APR and limit policies.
Apply constraints for loss rates, approval rate, fairness, credit policy, and capital.
Consider adverse selection and customer response to pricing.
Use grid search, constrained optimization, uplift modeling, or experimentation where appropriate.
Part 3 - Validation and Launch
Explain how you would validate and monitor the strategy.
What This Part Should Cover Guidance
Use backtests, champion-challenger tests, randomized pricing or limit tests where allowed, and cohort monitoring.