SWISS Federal Railways (SBB) recorded a 27.8% drop in year-on-year profit to SFr 100.8m ($US 108.4m) in the first half of 2013 despite reporting revenues of SFr 4.05bn, a 2% increase. SBB says the fall was mainly due to an increase of SFr 97m in train path prices, and higher expenditure - SFr 70m - on maintenance activities.