Call it a cautionary tale for young corporate lawyers who might be inclined to discuss their work in what they think is an innocent fashion.

On Thursday, federal prosecutors in Manhattan charged two former stockbrokers, Thomas Conradt of Denver and David Weishaus of Baltimore, with running an insider trading scheme that yielded more than $1 million in illicit profits based on confidential information about International Business Machines’s $1.2 billion acquisition of analytics software maker SPSS in 2009.