真的吗？那么雅虎的市值一定大幅度下降了。
过去五年时间里，雅虎股票价格已缩水一半。[{'character': '过', 'pinyin': 'guo4', 'highest pitch': 11.25, 'lowest pitch': 10.12, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '去', 'pinyin': 'qv4', 'highest pitch': 10.12, 'lowest pitch': 8.57, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '五', 'pinyin': 'u3', 'highest pitch': 8.57, 'lowest pitch': 6.01, 'duration': 0.12, 'prosody hierarchy': 'null'}, {'character': '年', 'pinyin': 'nian2', 'highest pitch': 10.1, 'lowest pitch': 6.01, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '时', 'pinyin': 'shiii2', 'highest pitch': 10.1, 'lowest pitch': 6.3, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '间', 'pinyin': 'jian1', 'highest pitch': 8.13, 'lowest pitch': 7.43, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '里', 'pinyin': 'li3', 'highest pitch': 7.44, 'lowest pitch': 4.3, 'duration': 0.24, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.23}, {'character': '雅', 'pinyin': 'ia2', 'highest pitch': 10.93, 'lowest pitch': 8.23, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '虎', 'pinyin': 'hu2', 'highest pitch': 10.93, 'lowest pitch': 9.58, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '股', 'pinyin': 'gu3', 'highest pitch': 8.37, 'lowest pitch': 5.83, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '票', 'pinyin': 'piao4', 'highest pitch': 8.76, 'lowest pitch': 5.83, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '价', 'pinyin': 'jia4', 'highest pitch': 8.85, 'lowest pitch': 6.43, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '格', 'pinyin': 'ge2', 'highest pitch': 6.91, 'lowest pitch': 5.89, 'duration': 0.31, 'prosody hierarchy': '#2'}, {'character': '已', 'pinyin': 'i3', 'highest pitch': 6.13, 'lowest pitch': 5.43, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '缩', 'pinyin': 'suo1', 'highest pitch': 10.2, 'lowest pitch': 5.43, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '水', 'pinyin': 'shuei3', 'highest pitch': 9.67, 'lowest pitch': 4.35, 'duration': 0.23, 'prosody hierarchy': '#1'}, {'character': '一', 'pinyin': 'i2', 'highest pitch': 5.66, 'lowest pitch': 4.25, 'duration': 0.11, 'prosody hierarchy': 'null'}, {'character': '半', 'pinyin': 'ban4', 'highest pitch': 9.39, 'lowest pitch': 6.67, 'duration': 0.27, 'prosody hierarchy': '#4'}]