Transocean (RIG -4.3%) is one of the day's largest large-cap losers after Goldman Sachs...

|About: Transocean Ltd. (RIG)|By:, SA News Editor

Transocean (RIG -4.3%) is one of the day's largest large-cap losers after Goldman Sachs initiates coverage with a Sell rating. The firm notes that while RIG has dominated the ultra-deepwater business, its rigs need extensive upgrades to keep them compliant in the post-Macondo world - which consensus estimates don't fully reflect.