Down from 14.0 in August and much weaker than median forecast of 10.
ZEW institute says sentiment indicator may not indicate a temporary slowdown, but could be first sign of flattening economic activity.
EUR/USD lower, presently at 1.2873.
Elsewhere euro zone industrial production for July also came in weaker than expected; flat m/m, +7.1% y/y compared to median forecasts +0.2%, +8.0% respectively.