Credit rating agency Standard & Poor's has downgraded the US' prized AAA-rating for the first time ever.
UK shares rounded off a dismal week with further heavy losses despite better than expected jobs data in the US, as worries over the Eurozone crisis worsened.
Chaos in markets across the globe this week following heavy sell-offs prompted some commentators to warn of a new credit crunch, and left investors desperately seeking safe assets.
Fidelity's Anthony Bolton has said this week's tumultuous equity markets should be seen by investors as a "time of opportunity".
US jobs data provided some much needed respite for investors on Friday, after the latest figures beat estimates.
Investment Week and our sister title Investment Europe provide ongoing updates on the turmoil in global markets as investors fret over the US and European debt crises.
Global markets are continuing to post heavy falls, with all major indices deep into the red, as concerns the eurozone debt crisis and weak US economy could lead to another recession.
The national newspapers spared front-page column inches to talk of a 'Credit Crunch 2' on Friday after a global sell-off wiped trillions off the value of equities worldwide.
Investors are flocking to safe haven UK government bonds as they seek shelter from turbulent global markets.
Jupiter CIO John Chatfeild-Roberts has urged investors to remain calm in the face of global market turmoil, adding he sees it as a buying opportunity, particularly for S&P 500 names.