Quote from eusdaiki:
countries do it all the time. Russia did it a few years ago with the nickel market.
From what I understand this is how they did it.
70% of the nickel market is supplied by france and canada. - their nickel is high quality and it never gets to sit in inventories for too long, it goes straight to factories. Russia's nickel on the other hand is not so good quality and it sits in warehouses for long periods of time.
In futures markets the price is not set by the highest quality product, it's set by the lower quality product that sits in the warehouses for a long time. Just like the coffee or coccoa that you'll find in the NYMEX warehouses is almost beyond consumption... is not about quality is about volume.
So the amount of nickel acummulated on russian warehouses has a huge effect on the price.
What did the russians do?
Put the nickel on submarines, take it for a 3 month ride, make the market think there's a shortage of nickel and start selling future contracts on it. A few months later they put it back on the warehouses... suddenly the warehouses are full again, there's way too much nickel... the price drops, they buy. Make a few Rubbles in the process...