ZURICH, Dec 12 (Reuters) - The Swiss ZEW investor sentiment improved by 12.4 points in December to -15.5 points, Credit Suisse, which issues the indicator in cooperation with the German ZEW economic research institute, said on Wednesday.

KEY NUMBERS

(points)

DEC '12 NOV '12 DEC '11

Expectations (investor sentiment) -15.5 -27.9 -72.0

Current conditions 6.6 0.0 -20.0

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Keywords: SWISS ECONOMY/ZEW

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