The investors service said Thursday it was boosting it rating in Las Vegas Sands' debt from B3 to B2. In August, Moody's assigned a "positive" rating outlook on the company. In a report to investors, Moody's Senior Vice President Keith Foley said the company is expected to derive the bulk of its revenues from the Marina Bay Sands, one of just two casinos in Singapore, and its three casinos in Macau. Moody's is not expecting much in the way of results from The Venetian or Palazzo, Las Vegas Sands' two Strip casinos. "We anticipate that strong future earnings performance at Las Vegas Sands' Asian casinos will more than offset the earnings pressure that we expect will continue at the company's U.S. subsidiary," Foley said. Las Vegas Sands partially opened the Marina Bay Sands in April and celebrated its grand opening in June. Other amenities at the hotel-casino are expected to open by the end of the year.