*ECB's Lagarde: Monpol Need To Remain Highly Accommodative For Prolonged Period

U.S. Producer Prices Unexpectedly Unchanged In November

*ECB's Lagarde: Some Indications Of A Mild Increase In Underlying Inflation

*Euro At More Than 5-week High Of 1.1154 Vs U.S. Dollar Amid Lagarde's Speech

*ECB's Lagarde: There Are Some Initial Signs Of Stabilisation In Growth Slowdown