Twitter $1B

Twitter expects to generate at least $1 billion in sales in 2014, sources said, indicating that the micro-blogging service will grow about twice as fast as some analysts now predict.

WebMD CEO

WebMD, an online provider of medical information, hired Cavan Redmond from Pfizer to be its new CEO.

Ethics vow

Walmart Stores CEO Mike Duke told employees and shareholders at the company’s annual meeting that the retailer, whose executives are accused of bribing Mexican officials, is committed to ethical behavior.

CFTC claim

The Commodity Futures Trading Commission staked a claim as a potential creditor of failed commodities brokerage MF Global, in a sign it may charge the bankrupt firm and seek monetary sanctions.

Crash course

The Securities and Exchange Commission approved a long-awaited plan by US stock exchanges to upgrade and broaden measures designed to guard markets against a repeat of the “flash crash” that occurred May 6, 2010.