A bank's unreconciled nostro items older than 30 days have risen from 12 to 45 in three months and now total Rs 60 crore. What does the trend signal, what amber and red thresholds would you set, and who must be told?

The trend signals a control that is losing ground: aged breaks have nearly quadrupled in twelve weeks, and Rs 60 crore of money movements cannot be explained. Set amber at 20 items or Rs 20 crore and red at 35 items or Rs 40 crore, each tied to a named action. On those thresholds the indicator went amber in week 5 and red in week 10; today it is red on both, so the head of operations, the financial controller and operational risk must be told now.

A household that stops reconciling its bank statement for a month usually finds a forgotten bill; one that stops for a year may find a stranger has been using its card. An aged break is money the bank cannot account for, and a rising count means the reconciliation process is falling further behind every week. The count has grown by about 2.8 items a week, and it is accelerating. The average item is Rs 1.33 crore, too large to be rounding. Three explanations are common: the team is short of people or a new system has changed file formats; one correspondent is sending bad statements; or someone is hiding something. You cannot tell which from the count, so the first ask is a breakdown by age, by correspondent and by direction, because unexplained payments out are more worrying than unexplained receipts.

Anchor them to what normal looks like and what the bank can tolerate, and set them on count and value, because 40 tiny items and one Rs 30 crore item are different problems. An indicator earns its place only if crossing a threshold triggers a named action by a named person within a set time. Amber at 20 items or Rs 20 crore: the head of reconciliations presents a clearance plan within a week and operational risk tracks it. Red at 35 items or Rs 40 crore: escalation to the head of operations and the financial controller, a daily clearance report, and a review of the largest items for possible loss or fraud. Any single item above, say, Rs 10 crore unexplained after 30 days goes straight to red whatever the count.

The indicator is red on both count and value. The head of operations owns the fix. The financial controller needs to know because Rs 60 crore of unexplained items may mean the balance sheet is wrong and some may need to be written off. Treasury needs to know because nostro balances feed its liquidity forecast. Operational risk logs it and reports it to the operational risk committee. And if the breakdown shows unexplained payments out concentrated in one account or one approver, internal audit and the fraud team are told the same day. The deeper finding is not the 45 items; it is that the indicator existed for three months with no threshold, so nobody was obliged to act.