AMSTERDAM, Sept 27 (Reuters) - Shares of Dutch insurers took a hit on Wednesday as a court ruling in a years-long fight over investment-linked products re-opened the prospect of large compensation claims. NN Group (NN.AS) traded down 13.5% at 0750 GMT in Amsterdam, while fellow Dutch insurer ASR (ASRNL.AS) fell 8.6%, as NN warned of the possibly "material adverse effect" of the interim court ruling. NN Group and other Dutch insurers have been dealing with issues related to these insurance policies, popularly known as "woekerpolissen" for years. "This also has impact for the legal cases against other Dutch insurers, who all sold similar unit-linked products at the time," KBC analysts wrote in a note. Between 2008 and 2010, Dutch insurers collectively paid clients about 3 billion euros ($3.2 billion) in compensation over similar policies, but several consumer groups have since filed suits arguing the compensation was too low.

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Persons: Bart Meijer, Louise Heavens, Christina Fincher Organizations: KBC, Aegon NL, Dutch, Thomson Locations: AMSTERDAM, Hague, Amsterdam