Piggy Banks and Punishment: How the Ruble's Oil Link Came Apart - Bloomberg

Piggy Banks and Punishment: How the Ruble's Oil Link Came Apart - Bloomberg:

The last time crude fell off a cliff in late 2015, it took the currency of the world’s biggest energy exporter along for the ride. As Brent lurched below $30 a barrel, Russia’s ruble plummeted to its weakest level on record.

Last month, with oil charting its steepest drop in a decade, a comparable move in the ruble was nowhere to be seen.

A multitude of factors -- from central bank measures to sanctions -- have contributed to the shift. Below is a summary of the biggest contributors and how they have eroded the link.