WiMi Hologram Cloud announced that the probability of backtest overfitting algorithm was used to blockchain and bitcoin trading strategies. PBO is computed based on the combinatorial symmetric cross-validation framework and is designed to quantify the risk of overfitting in small sample backtests. With PBO, it is possible to assess the overfitting probability of a strategy in a single backtest, thus reducing the risk of a poorly performing live model. However, relying on backtesting results alone is not enough. In order to obtain models that perform better out-of-sample, WiMi has developed a dynamic optimization algorithm based on PBO, namely the “PBO-DOA algorithm”. This algorithm is important in quantitative trading because it can dynamically optimize the model’s parameters to help investors build optimal portfolios.
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