In August 1996, the Exchange announced a closed tender for the selection and delivery of a new trading system (Multi Market Trading System/MMTS) to serve the cash and derivatives markets. After evaluating the proposals received, the Exchange decided to purchase the trading system offered by the consortium Computershare Technology Services (Australia) - CMA Small Systems (Sweden) - Debis IT Services Dataware (Hungary). The contract for this was signed on 8 October 1997.

The trading software is a high performance, scalable platform eventually a direct predecessor to X-Stream (a leading trading solution, now provided by OMX) that is currently one of the most preferred technology worldwide and operates in several exchanges. These include CNQ – Canadian Trading & Quotation System, ICAP, MICEX – Moscow Interbank Currency Exchange, Philippine Dealing&Exchange Corp., PLUS  Markets Goup and SWX Swiss Exchange.

The MMTS trading system of the Budapest Stock Exchange is a multi-market twin solution that was implemented in two different phases. MMTS I was launched in November 1998, the MMTS II module, serving the derivatives markets was put into operation in October 2000.

The two MMTS systems supported the development of even more transparent, more regulated market conditions and have introduced unique functionalities and a very enhanced unique trading and position management solution for the derivatives market.