In a tight bear hug since the beginning of this year, stock market investors across the world have lost more than $10 trillion -- an amount more than 10 times of the entire investor wealth in India.

All 52 equity markets of the world have suffered a loss of $10.5 trillion so far this year, leading rating agency and financial data provider Standard and Poor's said on Friday.

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The worldwide loss this year is 11.7 times of the total market valuation of all the listed companies in India, which currently stands at around $900 billion. Indian stock market valuation has nearly halved so far this year.

Year-to-date, all 26 developed markets have lost ground while nearly all the 26 emerging markets have suffered loss.

Jordan, was the only country that managed to return positive YTD returns (up 0.96 per cent).

"September was the worst month for emerging markets since August 1998," Silverblatt said, as all the 52 markets were down during the month, resulting in a loss of $4.1 trillion loss in equity.

In the third quarter all the 52 markets posted a loss of $5.8 trillion which amounted to a year-to-date loss of $10.5 trillion.

The fall was more severe in emerging markets, as they fell by 27.98 per cent, while developed markets lost 21.62 per cent during the third quarter of this year, according to Standard & Poors Senior Index Analyst Howard Silverblatt.

The US was down by 8.85 per cent, while Russia was off by 45.52 per cent. The Philippines was the only market that reported positive returns during the third quarter (0.04 per cent).