India, March 13 -- European stocks may open on a sluggish note Thursday as markets weigh macroeconomic concerns against optimism that U.S. negotiators could secure a ceasefire in the Ukraine war.

U.S. President Donald Trump threatened on Wednesday to escalate a global trade war with further tariffs on European Union goods after the EU hit back with import duties on €26 billion worth of American goods "matching the economic scope of the U.S. tariffs."

Canada also responded with 25 percent new tariffs on U.S.-made goods worth C$30 billion (€19 billion) effective at midnight New York time on Thursday, matching the U.S. tariffs "dollar for dollar."

Trump's hyper-focus on tariffs has rattled investors, consumers and business confi...