European style European style American or European-style 期權 European style European style European style European Options European style European style European style European style European style European style European style European style European style European style European style European style European style European style European style (en) European Options European style http://en.wikipedia.org/wiki/Option_style European style European style European European-Style European style European style European style European style European style (en) European style European style European style American option (en) http://en.wikipedia.org/wiki/Option_style American option European style European style (en)