Foreign-exchange brokers suspended transactions or raised the cost of trading the ruble as record price swings crimped liquidity. FXCM Inc. (FXCM), the third-largest currency broker for retail clients, will stop offering the ruble versus the dollar and begin closing its customers’ trades. Alpari UK Ltd. stopped clients from taking new positions, while Saxo Bank A/S and Gain Capital Holdings Inc.’s Forex.com said they planned to demand a higher deposit from clients to deal in the currency. “Most Western banks have stopped pricing USD/RUB,” Jaclyn Klein, a spokeswoman for New York-based FXCM, said in an e-mailed ... (full story)