That actually shows your understanding of thing you're trying to call economics. So here's the simple thing for you
1-The countries like Russia, Venezuela, Saudia, Iraq,Iran,Norwegian Krone etc's exports and fiscal account are behave as a function of International Oil Prices
2-If these countries decide to leave their currencies on floating regime, their currency would behave in a similar way as the oil price. Just like South African Rand tracks gold price.
3-In such a scenario, if the currency like Russia, Australia, New Zealand, Canada or South Africa follows a floating regime, their currencies track commodities that drive their exports and are called
Commodity Currencies. The prices, the currency's value is valnurable to shocks in commodity prices and hence the domestic economy and the central bank loses a fair amount of control over the foreign exchange.
What you're referring to as a "Miracle happened exactly after the oil prices slumped.
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And that's what the miracle really was, the oil prices stabilized
Nothing to do with the Russians on their own. Take a look at how slump in oil prices wrecked havoc on Venezuelan economy.
4-If the country decides to stay immune to the volatility in commodity prices, they fix their currencies against an anchor like USD (KSA,AED,IQD etc). Their currency remains stable but then the cost is total loss of foreign exchange to Federal Reserve's actions and a sharp depletion in foreign exchange reserves which the country exhausts in defending the peg. Not to mention the hurt cause by the two opposing forces working against you simultaneously the ME currencies effectively appreciating with an strengthening USD and shrinking Fiscal balance and Exports due to fall in oil prices.
http://www.businessinsider.com/saud...rves-slide-to-lowest-levels-since-2012-2016-3
http://www.forbes.com/sites/timdais...gn-reserves-as-oil-prices-slide/#551d8c083ba9
http://marketrealist.com/2016/02/saudi-arabia-depleting-forex-reserves-tide-situation/
I hope next time you would come with a complete understanding of what you're trying to say rather than posting stuff you wouldn't comprehend