How Stock_NeurIPS2018/agent_a2c.zip was obtained?

Hello,

There is a pre-trained agent (agent_a2c.zip) that is included in Stock_NeurIPS2018.
I also reran the notebooks 1 and 2 to train agent_a2c. However the backtest result of the new agent is much worse than the result of the pre-trained agent, even worse than the baseline DJI. Any ideas?

Thanks!

Tagging @ZiyiXia as I see the sample agent was uploaded by you. Was this generated by following the steps in the notebooks or is there anything special about it? It seems to perform much better than the one I re-generated.