TEC-10 index, published by Agence France Trésor, which measures interest rate paid by the State on its ten years bonds has reached on July 1st, an unprecedented level : 0,17%. It had fallen last Monday, after the announcement of the results of the British referendum, and had come back to the low levels attained during a few days, in April 2015. But the fall was amplified at the end of the week. Investors have chosen the safest assets when financial markets were confronted with a confidence crisis reflecting worries generated by the Brexit vote. But if stock markets ...