yup, stellar earnings from Burlington - they beat earnings expectations by 17 cents. When Starbucks beat earnings by 19 cents, their stock went up 18% that day.
Some stocks just react differently to good earnings. I guess most people just expect these types of reports from Berk's equities. But even if Berkshire's own stock value doesn't move, the retained earnings and book value are going through the roof. This will be realized on August 3 when Berk reports.