*Swiss franc slides to 3-day low of 1.1403 against US dollar

*Hungary March trade surplus EUR 492.8 mln, consensus EUR 285 mln

*Czech March trade surplus at CZK23.4 bln, consensus CZK7 bln surplus

*Hungary March industrial production rises 4.3% m-o-m

*Hungary March gross industrial output drops 15.6% on year