Well since short selling on financials is banned, it cant be covering of shorts.
It could possibly be Market Makers closing out their positions (I doubt it).
It could also be big money doing a some kind of market sweep.
think of it like this:
> Big money buys 1m worth of bank stock
> This in turn pushes up SPI futures (which they would already have money in) and make a profit of 5m because the futures moved so much.
Since i don't trade equities (anymore), and I'm not actively a SPI trader, I could be wrong.
This almost sounds like a case for........The PROPEX boys!
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