BASEL, Switzerland — European Central Bank president Jean-Claude Trichet rejected suggestions Monday that the bank's decision to buy government bonds compromised its legal independence from eurozone governments, saying the shared currency's chief monetary authority remained "fiercely and totally independent."

The decision to purchase bonds — called for by economists for weeks — did much to calm markets jittery about the continent's debt crisis, twinned with a nearly $1 trillion rescue loan program from the European Union and the International Monetary Fund.