The paper examines the extent and determinants of short-term horizons in ta
king open positions using a questionnaire mailed to professional foreign ex
change market participants in Germany. The findings reveal that the absolut
e anticipation horizon is short, but not necessarily short-termist. Another
related but empirically different measure is proposed based on the relativ
e length of different horizons; its use clearly shows widespread restrictio
ns in relation to optimal behavior. No determinants in personal characteris
tics were established for either empirical measure; rather the institutiona
l environment was found to be an influence. Thus, professionals may adapt r
ationally to their incentive structure, which works towards short-term hori
zons in position taking.