哪些因素可能导致股市欠缺趋势性的投资机会？
短期内，股市可能欠缺趋势性的投资机会，将维持震荡的格局。[{'character': '短', 'pinyin': 'duan3', 'highest pitch': 8.23, 'lowest pitch': 6.3, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '期', 'pinyin': 'qi1', 'highest pitch': 10.68, 'lowest pitch': 6.44, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '内', 'pinyin': 'nei4', 'highest pitch': 11.03, 'lowest pitch': 6.76, 'duration': 0.27, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.25}, {'character': '股', 'pinyin': 'gu3', 'highest pitch': 9.79, 'lowest pitch': 7.06, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '市', 'pinyin': 'shiii4', 'highest pitch': 10.72, 'lowest pitch': 7.17, 'duration': 0.25, 'prosody hierarchy': '#2'}, {'character': '可', 'pinyin': 'ke3', 'highest pitch': 8.27, 'lowest pitch': 6.67, 'duration': 0.13, 'prosody hierarchy': 'null'}, {'character': '能', 'pinyin': 'neng2', 'highest pitch': 6.67, 'lowest pitch': 5.9, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '欠', 'pinyin': 'qian4', 'highest pitch': 9.01, 'lowest pitch': 6.49, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '缺', 'pinyin': 'qve1', 'highest pitch': 8.87, 'lowest pitch': 7.06, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '趋', 'pinyin': 'qv1', 'highest pitch': 10.66, 'lowest pitch': 8.27, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '势', 'pinyin': 'shiii4', 'highest pitch': 10.72, 'lowest pitch': 8.9, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '性', 'pinyin': 'xing4', 'highest pitch': 9.11, 'lowest pitch': 6.35, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 6.56, 'lowest pitch': 6.02, 'duration': 0.1, 'prosody hierarchy': '#1'}, {'character': '投', 'pinyin': 'tou2', 'highest pitch': 7.0, 'lowest pitch': 6.35, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '资', 'pinyin': 'zii1', 'highest pitch': 8.13, 'lowest pitch': 6.36, 'duration': 0.13, 'prosody hierarchy': '#1'}, {'character': '机', 'pinyin': 'ji1', 'highest pitch': 8.28, 'lowest pitch': 7.06, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '会', 'pinyin': 'huei4', 'highest pitch': 14.2, 'lowest pitch': 7.04, 'duration': 0.25, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.23}, {'character': '将', 'pinyin': 'jiang1', 'highest pitch': 8.3, 'lowest pitch': 7.5, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '维', 'pinyin': 'uei2', 'highest pitch': 7.5, 'lowest pitch': 6.3, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '持', 'pinyin': 'chiii2', 'highest pitch': 7.33, 'lowest pitch': 6.94, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '震', 'pinyin': 'zhen4', 'highest pitch': 10.82, 'lowest pitch': 9.19, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '荡', 'pinyin': 'dang4', 'highest pitch': 9.53, 'lowest pitch': 6.56, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 6.56, 'lowest pitch': 5.59, 'duration': 0.12, 'prosody hierarchy': '#1'}, {'character': '格', 'pinyin': 'ge2', 'highest pitch': 6.6, 'lowest pitch': 5.87, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '局', 'pinyin': 'jv2', 'highest pitch': 6.6, 'lowest pitch': 5.0, 'duration': 0.32, 'prosody hierarchy': '#4'}]