When a company reports net dollar retention below 100% for 8+ consecutive quarters and then crosses above 100%, the signal quality is qualitatively different from a company that briefly dipped below 100% and recovered. An extended sub-100% period indicates structural contraction in the installed base — existing customers are net shrinking, not just temporarily pausing. A crossing above 100% in that context means a genuinely new expansion vector has taken hold, not a cyclical bounce. The longer the sub-100% streak, the more meaningful the inflection.
When tracking sub-100% NDR companies undergoing product pivots or entering new market segments, add a monitoring flag for when NDR crosses 100% after an extended streak. Treat the first crossing as a leading indicator worth updating the thesis on, not confirming evidence. The key validation test: is the NDR improvement driven by a new cohort (enterprise, AI-native) rather than recovery in the base that contracted? New-cohort-driven NDR recovery is more durable than base-recovery. Track which customer segments are driving the improvement.