I just eventually figured out the meaning of SDR … thanks to a book of Sapir.
SDR valuations which are very frequently mailed to IMF mailing system subscriber, including myself, are a system of valuation of all member states of the IMF, regarding their GDP and input within the global economy. A more important SDR valuation gives any state more power to vote and influence the IMF worldwide policies and internal decisions. It is a similar system to the link between votes and shares’ quantity in companies’boards.
And this is why China, which has not that much influence within the IMF was going to move away from Bretton woods institution through its own system.
Yet, given Doug Casey recent newsletter, changes are going to happen soon regarding China relative influence within the IMF internal rules.
I spoke about SDR valuation there.