The SEC says 16 Wall Street firms have agreed to pay $1.1B in combined penalties for failing to monitor employees using unauthorized messaging apps (Jennifer Surane/Bloomberg)

Jennifer Surane / Bloomberg:
The SEC says 16 Wall Street firms have agreed to pay $1.1B in combined penalties for failing to monitor employees using unauthorized messaging apps  —  Banking giants including Goldman Sachs Group Inc. and Citigroup Inc. agreed to pay regulators $1.1 billion in penalties for failing …