· Ratings slashed on global banks
· ECB may scrap ratings on Eurozone debt
· Spain needs €62bn to save struggling banks
· Greece faces emerging-market status
· Markets in US and Asia drop on weak US data
· European markets set to open weaker
· Dollar maintains biggest advance in 6 months
· Brent crude hits mega low
· Gold and silver set for worst week this year
· Commodity gauge slides to lowest level since 2010
