If you want to trade spreads in commodities, you must know the supply/demand of the physical for the period under consideration and who is holding the commodity. Additionally, technical factors such as a spot squeeze can come into play. There are all sorts of reasons a spread might move. Shipping problems, warehousing capacity, freight strikes.
Carry is just the cost of warehousing or storage + interest. The contract spec will state where the commodity can held. ie designated warehouses.
Re manipulation, I was referring more to the fact that NY does larger volume and has bigger open interest, so although it is still subject to spoofing, you should get a less choppy ride.
I was just having a nose around and yesterday's volume was London Whites 8774 NY11 Raws 84087.
Open interest, London 59308 NY 275343
I know which one I'd rather be trading.
Carry is just the cost of warehousing or storage + interest. The contract spec will state where the commodity can held. ie designated warehouses.
Re manipulation, I was referring more to the fact that NY does larger volume and has bigger open interest, so although it is still subject to spoofing, you should get a less choppy ride.
I was just having a nose around and yesterday's volume was London Whites 8774 NY11 Raws 84087.
Open interest, London 59308 NY 275343
I know which one I'd rather be trading.
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