Premarket: Wall Street set for strong open after Monday's holiday

World shares gained on Tuesday as investors weighed up the latest tariff-related news, while long-dated U.S. Treasury yields were set for their biggest one-day fall since mid-April, mirroring a steep price rally in super-long Japanese debt. After a weekend call with the European Commission's president, U.S. President Donald Trump paused until July 9 his threatened tariff of 50% on goods entering the United States from the European Union. European shares added 0.4%, supported by defence stocks, with UK shares gaining 1% following a holiday at the start of the week. Wall Street shares, which also saw no trade on Monday…