Markets around the world sold-off overnight while oil continued to soar, as the prospect of military involvement in Syria's civil war grows.
US stock exchanges halted all trading in companies listed on the Nasdaq on Thursday after a "serious" technical issue stopped it from quoting share prices accurately.
Big moves in the technology and materials sectors helped the S&P 500 close at its highest ever level on Monday.
Nasdaq OMX and PC Bond, a provider of Canadian fixed income benchmarks, have joined forces to create a family of US Treasury indices.
The NASDAQ OMX Global Water Index is designed to track the performance of companies worldwide that are creating products that conserve and purify water for homes, businesses and industries.
US markets opened higher this afternoon after shaking off losses sparked by yesterday's surprise Standard & Poor's downgrade of the outlook for US debt.
The FTSE has broken through 6,000 this morning, following a strong performance from the US with the Dow Jones soaring to a two year high.
Motilal Oswal Asset Management has filed with the Securities and Exchange Board of India (SEBI) for the country's first US equity ETF.
The Nasdaq OMX Group has created five indices designed to measure the performance between stocks and ETFs.