Question: 海航控股的最近一个交易日涨跌幅
Answer: 必答点：海航控股的最新涨跌幅
精度要求：仅允许四舍五入误差
Date: 2025/8/14
Reference data: {"600221___SH":{"RT_TIME":"150002","RT_PCT_CHG":"-0.0263","RT_DATE":"20250814"}}