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Nature 441, 1047 (29 June 2006) | doi:10.1038/4411047b; Published online 28 June 2006

Open Innovation Challenges

Market watch

Colin Macilwain

Stocks in companies associated with nanotechnology took a pounding in May as global investors ran away from risk. The market dived as part of the month's general stock-market dip, when fears of higher interest rates sucked money out of risky investments.

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