ETF tracking error

The FTSE100 should be up over 3% but I shares core FTSE 100 ( isf) is in the red??

@Runningman This is because the ETF’s daily percentage change is comparing the current price to the previous closing price (which was not the actual closing price at 16:30). The ETF stopped quoting at 12:28 GMT when the price was 546.20.

We’re currently switching data feed providers so these issues will be long gone very soon.