You are very naughty because I am very busy now.
I will do this once and will not answer to any other question because this isn't a topic I am interested in discussing.
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On March 21, the number of total contracts decreased substantially. I don't know what happened to US economy. Shrunk?
Overall, the net position of specialised traders like speculators has been long since January while the net position of hedgers who use futures to hedge price risk has been short. So I guess the price of S&P has been rising ?
I don't know how to interpret this figure more clearly because I don't trade stock indice
I was always naughty in class

Pity you have not more time, as I have loads of questions about the intricate workings of finance.
Cheers.