($EURUSD, $MACRO, $UBS) An unidentified Chinese state-run bank has halted foreign-exchange swaps with several European banks, with the suspension believed to include BNP Paribas SA and UBS AG, according to reports citing unnamed sources. The Chinese bank involved is the "most active" in the market for trading those products according to Dow Jone Newswires, which reported that the halt began Monday. Societe Generale SA and Credit Agricole SA are also included in the ban along with BNP and UBS, according to Reuters