What caused the sudden 20% drop in successful Auth transactions for Plaid's top 5 bank integrations yesterday?

Introduction

A sudden 20% drop in successful Auth transactions for Plaid's top 5 bank integrations is a critical issue that demands immediate attention. This analysis will systematically identify, validate, and address the root cause while considering both short-term fixes and long-term strategic implications.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking this could be a recent change. Has there been any system update or deployment in the last 24-48 hours?

Why it matters: Recent changes often correlate with sudden performance drops. Expected answer: Yes, a minor update was pushed yesterday. Impact on approach: If confirmed, we'd focus on rollback options and code review.

• Considering the scope, I'm curious about the geographic distribution. Is this drop consistent across all regions, or are some areas more affected?

Why it matters: Localized issues might point to specific server problems or regional bank changes. Expected answer: The drop is more pronounced in certain regions. Impact on approach: We'd prioritize investigating region-specific factors and infrastructure.

• Given the specificity to top 5 banks, I'm wondering about the performance of other integrations. Are smaller bank integrations experiencing similar issues?

Why it matters: This helps determine if the problem is systemic or specific to major integrations. Expected answer: Smaller integrations are unaffected. Impact on approach: We'd focus on factors unique to larger bank integrations.

• Thinking about user experience, have there been any spikes in customer support tickets or social media mentions related to authentication issues?

Why it matters: User feedback can provide valuable insights into the nature of the problem. Expected answer: Yes, there's been an increase in related support tickets. Impact on approach: We'd analyze user reports to identify common themes or error messages.