//JPMorgan Probe Revived by Regulators’ Data Mining

JPMorgan Probe Revived by Regulators’ Data Mining

WASHINGTON—Investigators probing whether traders at JPMorgan Chase & Co. rigged silver prices seven years ago decided there was no case to bring. Last week, the same agency hammered the megabank with a $920 million fine.

How a small agency that once walked away from an investigation of price manipulation, only to later impose its biggest fine ever for the conduct, shows the advances government has made in using data to uncover market manipulation, said James McDonald, enforcement director of the Commodity Futures Trading Commission.

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