运行backtest.py的时候发现模型只交易一次

[shijie2016]

[3546168:MainThread](2024-07-22 15:38:17,578) WARNING - qlib.BaseExecutor - [executor.py:121] - common_infra is not set for <qlib.backtest.executor.SimulatorExecutor object at 0x7f20715f1a90>
[3546168:MainThread](2024-07-22 15:38:17,586) INFO - qlib.backtest caller - [init.py:93] - Create new exchange
[3546168:MainThread](2024-07-22 15:38:22,995) WARNING - qlib.online operator - [exchange.py:219] - $close field data contains nan.
[3546168:MainThread](2024-07-22 15:38:22,997) WARNING - qlib.online operator - [exchange.py:219] - $close field data contains nan.
backtest loop: 100%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 486/486 [00:13<00:00, 34.72it/s]
account return total_turnover turnover total_cost cost value cash bench
datetime
2020-01-02 1.000000e+08 0.000000e+00 0.000000e+00 0.000000 0.000000 0.000000 0.000000e+00 1.000000e+08 0.013587
2020-01-03 9.985753e+07 2.890010e-16 9.498240e+07 0.949824 142473.598207 0.001425 9.498240e+07 4.875128e+06 -0.001752
2020-01-06 1.004644e+08 6.077607e-03 9.498240e+07 0.000000 142473.598207 0.000000 9.558929e+07 4.875128e+06 -0.003780
2020-01-07 1.012522e+08 7.841302e-03 9.498240e+07 0.000000 142473.598207 0.000000 9.637707e+07 4.875128e+06 0.007491
2020-01-08 1.000265e+08 -1.210573e-02 9.498240e+07 0.000000 142473.598207 0.000000 9.515133e+07 4.875128e+06 -0.011516
之后的turnover就一直是0了，是因为我的数据没有下全么？采用的是baostock的数据，换成qlib官方的数据也是一样的。只交易一次。