US growth optimism is driving the Dollar higher. Therefore, Kit Juckes, Chief Global FX Strategist at Société Générale, expects EUR/USD and GBP/USD to remain vulnerable. 

Euro and Sterling are hostage to economic data 

I’m not going to pretend there has been a fantastic correlation between growth expectations and EUR/USD moves in the last year, but the relative shift this month is big enough to threaten a fall to EUR/USD 1.05 in the coming weeks. 

As for EUR/GBP, the strong short-covering we saw in the first half of this year came from a correction to over-pessimistic growth expectations, but that support has gone now. Sterling too, is vulnerable against the Dollar here