Panasonic Corp.'s consolidated net loss for the business year through March is expected to exceed ¥300 billion, due chiefly to additional costs for streamlining its manufacturing operations along with valuation losses on its stock holdings, sources said Sunday.

The news broke last week that the Osaka-based electronics giant will suffer its first red ink in six years.

Panasonic is set to make official its downward revision of its earnings projection Wednesday when it announces the group earnings results for the first three quarters, the sources said.