European natural gas traders are betting Russia ’s economy can’t afford to lose more than $100 billion if the crisis in Ukraine escalates, reducing the odds of a long-lasting supply cut to the former Soviet nation. Gas futures in the U.K., Europe’s biggest market, declined 19 percent since Russia invaded Crimea in February and tumbled last week to the lowest since 2010. An escalation of the conflict with Ukraine could cost Russia $115 billion on average in 2015, or more than 3 percent of its gross domestic product, according to IHS Inc. Expanding sanctions from the U.S. and European Union threaten Russia’s economy, which the International Monetary Fund says is entering a recession. The world’s biggest energy exporter is struggling to raise investments to stimulate growth as ties with the U.S. and the EU deteriorate, sparking capital flight and a selloff of ruble assets. “The Russian economy is already […]