The future of NYSE Euronext’s bond indices has become uncertain after Borsa Italiana informed the exchange it will exercise a call option on Euronext’s stake in MTS, the index on which the contracts are based. NYSE Euronext together with Borsa Italiana, a joint venture known as MBE Holdings, owns a 60.37% stake in MTS, which allows NYSE Euronext to offer four government bond futures derived from the Spanish pan-European bond platform. The products are popular with traders, with over 27,576 contracts being traded from January to May this year, but with Borsa Italiana informing...