What caused the sudden 25% decrease in money transfer transactions between N26 accounts yesterday?

Introduction

The sudden 25% decrease in money transfer transactions between N26 accounts yesterday is a critical issue that demands immediate attention. As we dive into this analysis, we'll systematically explore potential causes, gather relevant data, and develop a strategic plan to address the root of the problem.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking this could be a technical glitch. Has there been any recent system update or maintenance that coincided with this drop?

Why it matters: Technical issues often cause sudden drops in transaction volume. Expected answer: Yes, there was a system update the night before. Impact on approach: If confirmed, we'd focus on technical root causes first.

• Considering user behavior, I'm curious about the distribution of this decrease. Was it uniform across all user segments or concentrated in specific groups?

Why it matters: Helps distinguish between technical issues and user-related factors. Expected answer: The decrease was more pronounced among power users. Impact on approach: If true, we'd investigate factors affecting high-volume users specifically.

• Thinking about external factors, have there been any significant economic news or events that might have influenced user behavior?

Why it matters: External events can sometimes explain sudden changes in financial activity. Expected answer: No major economic events reported. Impact on approach: If confirmed, we'd focus more on internal factors.

• Regarding system monitoring, are we confident in the accuracy of our transaction tracking system? Has there been any change in how we measure or report these transactions?

Why it matters: Ensures we're not dealing with a data anomaly rather than an actual decrease. Expected answer: No changes in measurement systems. Impact on approach: If confirmed, we can trust the reported decrease is real.