The US stocks going up last night was mainly due to selling/weakening of USD, I think. If you look at USD as compared to the other currencies, people are dumping USD for Euro.
Daily US Opening News And Market Re-Cap: October 27
Submitted by Tyler Durden on 10/27/2011 -
08:05
European leaders agreed, in principle, to boost the firepower of the EFSF to approximately EUR 1trl using a combination of a special purpose investment vehicle and a debt-insurance scheme. The leaders also struck a deal with private banks and insurers for them to
accept a 50% loss on their Greek government bond holdings According to EU sources, the EU is to present Eurobond ideas on November 23rd
According to a German government official, direct or indirect financing via the ECB is ruled out, adding that haircut excluded Greek bonds held by the ECB
BoE's Fisher said that the BoE will revisit QE once the current purchase is complete, adding that there is a significant chance of a double dip recession in the UK
You are right about the USD moving in tendem, in the opposite direction. Nowadays, most asset classes are so highly correlated.