A single bet on Deutsche Bank’s CDS is seen behind Friday’s route

Regulators designate a trade on Deutsche Bank AG’s credit default swaps it suspects led to a global sell-off on Friday.

It was a bet of about 5 million euros ($5.4 million) on swaps linked to the German bank’s junior debt, according to people familiar with the matter, who said regulators have spoken to market participants about the transaction. The contracts can be illiquid, so a single bet can trigger big moves. A Deutsche Bank spokeswoman declined to comment.