The Russian rouble just sank to the lowest point in its history, above 50 to the dollar.
It's down 5.27% against the US currency today alone. The dollar is about 50% stronger against the rouble than it was at the start of 2014. It's following the crumbling price of oil,
Here's what the US dollar-Russian rouble exhange rate looks like over the last five years:
Bloomberg, Business Insider
The fall in oil prices has dramatically weakened the Russian currency, which had been much more stable in the previous three years.
Brent crude is now down to just $68, and the other major benchmark of oil prices, West Texas Intermediate (WTI) is down to just $65, a five and a half year low.