By 8:20 a.m. in London (3:20 a.m. ET), the pan-European Stoxx 600 was 0.3% higher, with most regional bourses seeing gains. The index was last seen trading at an all-time high, while Spain's IBEX 35 also rose to a record high in early trade after touching on a record price in the previous session.LONDON — European stocks opened broadly higher on Tuesday, with some indexes touching record highs as investors track geopolitical developments following the U.S.' ouster of Venezuelan leader Nicolas Maduro.Looking ...