Rivera said MTS, originally launched by the Italian Treasury and the Bank of Italy as a platform for trading Italian government bonds, was strategic for the country. He said the Treasury was monitoring developments in takeover negotiations between LSE Group and data provider Refinitiv.

"We're following developments in the issue around LSE and Refinitiv. The information situation is fluid and by definition incomplete," he told Reuters when asked whether the Treasury had received reassurances from London.

LSE Group owns Italian stock exchange Borsa Italiana, which in turn controls the MTS platform on which Italian government bonds are traded.

(Reporting by Giuseppe Fonte; writing by Francesca Landini)