Anyone successfully run a US benchmark yet? There seem to be a bug with US version, instrument variable got evaluated to NAN.

🐛 Bug Description

To Reproduce

Steps to reproduce the behavior:

1. take any yaml file under examples/benchmark. I'll take workflow_config_lightgbm_Alpha158.yaml for example.

2. Change all fields from china version to US version:
   2.1 change (provider_uri: "/.qlib/qlib_data/cn_data") to (provider_uri: "/.qlib/qlib_data/us_data")
   2.2 change( region: cn) to (region: us)
   2.3 change (market: &market csi300) to (market: &market sp500)
   2.4 change (benchmark: &benchmark SH000300) to (benchmark: &benchmark ^GSPC)

3. Run
   qrun workflow_config_lightgbm_Alpha158.yaml

Expected Behavior

AttributeError: 'float' object has no attribute 'lower'

Upon closer debugging, the instrument variable was evaluated to Nan.

Screenshot

Environment

Note: User could run cd scripts && python collect_info.py all under project directory to get system information
and paste them here directly.

Windows
AMD64
Windows-10-10.0.22621-SP0
10.0.22621

Python version: 3.8.15 (default, Nov 24 2022, 14:38:14) [MSC v.1916 64 bit (AMD64)]

Qlib version: 0.9.0.99
numpy==1.23.5
pandas==1.5.2
scipy==1.9.3
requests==2.28.1
sacred==0.8.2
python-socketio==5.7.2
redis==4.4.0
python-redis-lock==4.0.0
schedule==1.1.0
cvxpy==1.2.3
hyperopt==0.1.2
fire==0.5.0
statsmodels==0.13.5
xlrd==2.0.1
plotly==5.11.0
matplotlib==3.6.2
tables==3.8.0
pyyaml==6.0
mlflow==1.30.0
tqdm==4.64.1
loguru==0.6.0
lightgbm==3.3.3
tornado==6.2
joblib==1.2.0
fire==0.5.0
ruamel.yaml==0.17.21

Additional Notes

Start with examples/benchmark/workflow_config_lightgbm_Alpha158.yaml and reproduce the US substitutions using qrun. Trace how the US provider, region, market, and benchmark values are loaded until instrument becomes NaN and the lower() error occurs. Done means the US benchmark runs without the NaN instrument or AttributeError.