DPD, MOB Và Vintage Analysis: Vì Sao NPL Luôn Đến Muộn

Điểm cần nhớ

• NPL là lagging metric; early delinquency và vintage mới là nơi policy change lộ tín hiệu sớm.
• DPD bucket là cách portfolio team nhìn dòng chảy rủi ro qua thời gian.
• MOB giúp so các khoản vay ở cùng “độ tuổi”, tránh kết luận sai vì cohort chưa mature.
• FPD và 30+ DPD at MOB 1-3 là cầu nối giữa approval tăng hôm nay và NPL vài tháng sau.
• Vintage analysis là công cụ stakeholder management: nó biến tranh luận “có vẻ ổn” thành bằng chứng theo cohort.

NPL is late by design

If you wait for NPL to evaluate a new policy, you are reading the past. A newly booked loan needs time to pass through repayment cycles, become delinquent and mature into default.

The earlier chain is:

textCopy
FPD -> 30+ DPD at MOB 1-3 -> 60+ DPD at MOB 3-6 -> NPL/90+ DPD

Why MOB and vintage matter

MOB makes comparisons fair by account age. Vintage analysis groups loans by booking month and compares performance at the same MOB. This prevents a common mistake: declaring a new cohort safe simply because it is too young to show NPL.

Practical case

If a cutoff is relaxed from PD <= 5% to PD <= 7.5%, do not judge the change by current NPL. Read the marginal group, FPD, 30+ DPD at MOB 1-3, and vintage by channel and product.

Takeaway

NPL tells you where risk has already arrived. Vintage tells you how risk is moving. A DS in lending needs the second view to manage stakeholders before the first one becomes painful.