Russian markets react cautiously to Trump’s threat of new sanctions, with a weaker rouble and higher oil prices expected. Rouble fell 4.3% to 81.9 to the U.S. dollar. Shares in exporting companies rise as rouble weakens. Central bank’s interest rate cut also contributes to rouble’s fall. Energy revenue vital to state budget.

Weaker rouble boosts export competitiveness but hurts revenue of Russian commodity firms. Rouble’s strength due to central bank policy and hopes of easing tensions. Analysts warn significant slide in rouble could harm economy. Investors buying foreign currency to hedge against potential export revenue drop. Previous U.S. sanctions caused rouble to plummet.

Read more at Yahoo Finance: Weak rouble, higher oil may help Russia if Trump’s tariffs hit, analysts say