twilight zone

there's a con job happening... ftse is up 0.23%, right, xjo closed at 4981, and at that time spi was at 4956, a 25 pt discount to xjo. Now spi is at 4982, an appreciation of 26 pts or 0.52% since the close of the cash index. Assuming that spi maintains its 25 pt discount to xjo, this places xjo at 5007 at the open in the morning! Meanwhile, sp500 futures have actually lost value since the close of xjo... what conclusions would you draw?