Sumitomo's chief copper trader hid losses for a decade, costing US$1.8 billion
Sumitomo Corporation (copper) · Trading house (listed)
The case in brief
Visible before detection
Checks that could have surfaced it, on hindsight
Third-party confirmation
Would have confirmed positions with brokers.
Can mislead when: Counterparties can collude or ignore requests. A non-response is logged as a gap, never as a pass.
Governance signals
Would have tested trading limits.
Can mislead when: Private companies file late, so these signals are lagging. Kubr uses them to support other flags, not to prove anything alone.
Document authenticity / direct pull
Would have pulled exchange records.
Can mislead when: The company can refuse consent, and a refusal is itself a flag. Some banks and co-op banks are not on AA yet.
Where Kubr services would have helped
IC note
Offered in India- C5 Would have pulled exchange records.
- C11 Would have tested trading limits.
Verified Snapshot
Offered in India- C11 Would have tested trading limits.
Financial diligence
Offered in India- C5 Would have pulled exchange records.
Legal diligence support
Offered in India- C11 Would have tested trading limits.
Mapped from the checks each service runs. A hindsight reading of public records, not a promise that the failure would have been found.
Same pattern
A summary of public documents. It reports what the sources say. It is not Kubr's finding and not a statement of guilt.