A Thought I Can’t Shake Off: Young Portfolios Look Healthier Than They Really Are
There’s a thought that has been sitting with me for a while, and the more portfolios I look at, the harder it is to ignore. Keeping portfolio delinquency low is not just about credit quality. It’s also about keeping the portfolio young. By young, I don’t mean new as in inexperienced teams or reckless growth. I mean average age of the loan book , measured in months on book. Let me explain where this comes from. Delinquency doesn’t show up evenly over time Almost every lending product behaves the same way if you track it long enough. Early months are usually clean. Then delinquencies start appearing. There’s a phase where defaults peak. Eventually, things stabilize or run off. This is not theory. You see it in microfinance, MSME, LAP, unsecured personal loans. The timeline differs, but the shape doesn’t. So when I see a portfolio with very low delinquency, one of my first silent questions is not “how great is underwriting?” but: How old is this book? Why a young book automati...