The ruble is gaining and is the world's best performing currency versus the dollar in recent weeks amid rate hikes and energy costs

• Russia's ruble is the world's top-performing currency against the dollar in recent weeks.
• The ruble has jumped more than 10% since hitting a trough of around 100 against the greenback early last month.
• Still, the ruble is down 17% against the dollar year to date as Russia's economy battles a host of problems.

Russia's ruble is in the midst of a recovery that's taken the currency to the highest levels seen in five months, undoing some of the plunge it saw over the past year.