The Russian ruble is tumbling as inflation picks up

The Russian ruble is tumbling.
The petrocurrency is down by 1% at 58.1678 per dollar as of 8:06 a.m. ET.
Earlier, data showed that Russian PPI rose by 12.7% year-over-year in January, marking the highest inflation since November 2015. It followed the 7.4% increase in December. 
Moreover, Brent crude oil prices, which are down by 0.5% at $55.38 per barrel.
Although the ruble is down on Friday, the currency has strengthened in February, which has rattled the Ministry