RE: US Finish12 Feb 2021 09:25
Narky, I don't think it's arbitrage, it's just another overnight swing.
I have noticed big differences before when the Nas was up at close and London opened sharply lower the next day. The closing Nas is clearly a guide, but not infallible. London investors clearly have a mind of their own.
When there are Vod announcements that could affect the sp, I think they are early before London opens, but that was not the case today.
All the more surprising as the £ is lower today against the $ and euro, which should support VOD to some extent.