The schedule for trading in Twitter Inc. shares (short code: TWR, ISIN: US90184L1026) today on November 07, 2013 has been determined as follows (all times are CEST): Start Pre-Trading Phase: 7.30 a.m. Start Call Phase opening auction: 3.30 p.m. First price determination: after the first price determination in XFRA, at 3.30 p.m. earliest Start Call Phase closing auction: 5.30 p.m.