PARIS, June 6 (Reuters) – The main European stock markets were stable at the start of the session on Tuesday, investors wondering about the evolution of the monetary policy of central banks and the American economy. In Paris, the CAC 40 lost 0.1% to 7,193.49 points around 07:50 GMT. In London, the FTSE 100 lost 0.04% and in Frankfurt, the Dax advanced by 0.02%. The EuroStoxx 50 index is up 0.17%, the FTSEurofirst 300 gleans 0.06% and the Stoxx 600 0.01%. The lower-than-expected reading for the ISM services index, with new orders falling and a measure of input prices at a three-year low, has fueled debate over whether the Fed is leaning towards a pause in the rate hike on June 14. Michael Hewson at CMC Markets points out in a note that the “weakness of the ISM report contrasts sharply with other numbers for the services sector, raising more questions than answers about the strength of the US economy.” Eight days before the decisions of the Federal Open Market Committee (FOMC), these uncertainties temper the attractiveness of the equity markets, especially since the possible pause by the Fed next week could be followed by a rate hike in July, according to number of observers. The Bank of Australia decided to opt for a further quarter-point monetary tightening on Tuesday and warned that it could continue on this path to bring inflation back to target. As for the European Central Bank, there is little doubt that another rate hike will be decided on June 15, its president Christine Lagarde having declared on Monday that there is no “hard evidence” that a peak has been reached in underlying inflation. In terms of indicators, industrial orders in Germany fell by 0.4% in April, while the Reuters consensus gave them up by 3%. Suspended on Monday, Biocorp shares jumped 15.70% after the announcement of exclusive negotiations with Novo Nordisk for the acquisition of a controlling stake, followed by a mandatory takeover bid, of the French device designer medical. Monte dei Paschi advances by 2.46%, the newspaper La Repubblica having reported that the Italian Treasury was in favor of a merger between MPS and BPER Banca (-0.04%), whose main shareholders have given a preliminary green light to a possible operation. (Laetitia Volga, edited by Blandine Hénault)