Shares of Nikon Corp. traded down 6.9% in Tokyo on Tuesday afternoon after rival microchip-equipment-making firm ASML Holding N.V announced a tie up that could see Intel Corp. invest more than $4 billion in the company. Concerns were that Nikon's business with Intel could be hurt by the U.S. chip maker's alliance with ASML. Intel said on Monday that part of the investment would go towards helping to bring forward development by about two years the latest generation of chip-manufacturing technology.

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