Most global markets sustained losses overnight amid a lack of economic catalysts.

On Wall Street, attention shifted to tonight's presentation by Apple, where the tech giant is expected to reveal the hotly anticipated iPhone 6, along with other new product announcements.

Shares in Apple have risen to an all-time high ahead of tonight's product launch. Energy stocks were among the heaviest decliners in the US following the recent slide in oil prices.

In commodity markets, crude futures weakened further as yesterday's weak growth figures from Japan and disappointing import data out of China dimmed the outlook for global energy demand.

Gold also came under selling pressure as traders put geopolitical tensions in Iraq and Ukraine on the back burner.

In currency markets, money continues to flow into the US dollar. The greenback surged against the Aussie and yen; the latter hurt badly by yesterday's data showing a 7.1% contraction in Japanese GDP last quarter.

Elsewhere, the pound slid to a 10-month low versus the greenback as the momentum for Scotland to secede from the UK continues to gather pace.

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