Many are disappointed with the pledges made by G8 leaders to tackle global warming. Henk Keilman, CEO of privately-owned venture capital company RIG Investments, discusses the G8 agreement and importance of investing in green technology.

The stock market correction has further to run, but it's unclear whether indexes will revisit the March lows, Simon Goodfellow from ING Wholesale Banking told CNBC Friday. "We're going down in the short term," he added.

The timing of the Guardian newspapers report on allegations of phone hacking by the News of the World could be related to the political process in the UK, Catherine Mayer from Time Magazine told CNBC Friday.

As pirates continue to steal headlines with high-profile attacks, Richard Meade from Lloyd’s List spoke to CNBC about his exclusive interview with a "senior operational pirate" responsible for dozens of highjacks.

Commitments from US President Obama on climate change at the G8 summit in Italy are a significant step forward, Andrew Torrance from Allianz told CNBC Friday. Abyd Karmali from Bank of America Merrill Lynch joined the discussion.

The pressure of chasing breaking news ahead of the competition may be forcing journalists to resort to underhand and illegal tactics, Jonathan Fenby, former editor of the Observer newspaper, told CNBC.

Four Rio Tinto employees and a Chinese steel executive have been detained for leaking the "bottom line" of China's iron-ore price. Jonathan Fenby from Trusted Sources considers the impact.

Policymakers have been buying time and we are running out of time, Steen Jakobsen from Capinordic said Friday as to why he sees stock markets declining in July and August. "We'll be taking out the 666 (low hit in March) in the S&P (500 index)," he predicted.

"Overall on the world's stock markets there's selling pressure coming into the markets," Royce Tostrams from Tostrams Groep said Friday. The uptrend which started in March of this year has ended, he added. "Remain on the sidelines. Don't enter the market too soon," he warned.

The financial system is likely to see some weakness and the government will have to come in with additional funding of some sort, Dodge Dorland, CIO of Landor Capital Management, said on reports that the Treasury sold warrants to bailed out banks below market value.

"We've enjoyed a pretty nice rally," Eric Le Coz from Carmignac Gestion said Thursday. "The recent data has been a bit more ambiguous." He added that in a recovery environment a period of "re-stocking" must take place and that hasn't happened yet.

Financial regulation needs to be agreed at a global level to be effective, Sir Howard Davies, a former chairman of the Financial Services Authority, told CNBC. Chris Rexworthy from IMS Consulting joined the discussion.

Angel Gurria, secretary general of OECD, spoke to CNBC about the key issues being discussed at the G8 summit in Italy.

"Sadly the G8 is not terribly important now the G20, which is now the key body, has rather superseded it," Sir Howard Davies from the London School of Economics and Political Science told CNBC Thursday. Angel Gurria, secretary general of OECD, joined the discussion.

Leaders of the world’s top 8 economies agreed to limit global warming to a rise of 2 degrees, at the G8 summit in Italy. Mark Woodall, CEO of Climate Change Capital, spoke to CNBC about the impact.

"I've got little faith in all these recovery stories, I think growth is going to be sub-par for some time to come," David Bloom from HSBC told CNBC after the IMF revised upwards its global growth expectations for next year.

"In terms of the global economy, it's such a mixed bag of indicators right now," Tony Fratto, former White House Deputy Press Secretary for the Bush Administration told CNBC Thursday.

The future price of a troy ounce of silver will likely bounce higher toward $13.60, but then fall back down toward $10.90, Chris Zwermann from Zwermann Financial told CNBC Thursday.

As G8 leaders meet to discuss a global financial regulatory framework, the UK government is expected to announce new banking regulation plans this week. Tony Shearer, chairman of IMAS and & CEO of Singer & Friedlander, discusses the importance of new banking reforms.

Oil demand continues to be weak and the US driving season has got off to a slow start, which could add to the drag on crude prices, Malcolm Graham-Wood from Hanson Westhouse told CNBC Wednesday.

The start of the week brings another pair of economic stimulus packages. This time it's the governments of India and Australia that are going to find ways of pushing money into their economies in an attempt to stave off the worst effects of slowing growth.