Precision Castparts Corp.'s credit metrics will be weaker than we previously expected in 2020 and 2021 due to the effects of the coronavirus pandemic and its elevated net debt on its earnings. However, we expect its credit metrics to return to levels that are appropriate for the current rating supported by its position as a strategically important subsidiary of Berkshire Hathaway Inc. Therefore, we are lowering our stand-alone credit profile (SACP) on Precision to 'a' from 'a+' and affirming our 'AA-' issuer credit rating and unsecured debt rating. The stable outlook reflects our expectation that the company's credit metrics will return to levels appropriate for the rating in 2021 despite weakening in 2020. The stable outlook on Precision Castparts reflects
