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XIV data difference

There is a large difference in the XIV data between Q and other source..
Why? In the backtest the diff %.
..the "Open" difference is enourmous

2 responses

Y, the 9/9/16 open data seems wrong on all the stocks I tried. It seems a lot closer to the close than the open.

Wasn't there something in the documentation about the open being unusable? I don't see it there now.

Probably because data.current is suitable for live/current data; using data.history all is fine, both Open and Close price are correct.
But, still small difference (0,2%) in the closing price between provider (Q, Y, G) still exist. Booohhh????!!! ???