The Russia thing is a by product of what Saudi is doing. Reduced price is to make certain types (shale/tar sands) of production and smaller producers un-competitive. The low price though will not just hurt small producers it’s hurting major companies (Petrobras etc) due to there high borrowings, this has a knock on effect for many banks (HSBC etc). Also the reduced price is harming countries like Nigeria and Venezuela as there cost of production like Russia’s is very high.
Saudi is not to pleased that the US now has really cheap energy cost (shale etc) that are about a 5th of UK cost. This makes the US a net exporter of energy for the 1st time since the 50’s. It could be looked that as a threat to the middle east if the US does not require oil from that region anymore (this pure speculation on my part). Whatever the reasons, its the Saudi’s who have not reduced production thus undermining the OPEC cartel.
It’s also hurting many companies who supply into the oil and gas industry, even now there a planned redundancies to come. There is a chance major projects will get pulled if the low price continues (below $70/B). This in turn hurts alternative energy technologies as they become un-competitive against oil and helps the naysayer who still think oil will last forever.
It could be a while before we see a return to $80/b, in the meantime enjoy the low price of petrol and Diesel. The tax take will be down significantly for many countries, this will be bad for some.
I could be completely wrong of course.