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"Forecasting Performance is not always Coefficient Correlation?"
I am running some prediction models using neural network and I always use Forecasting Performance as an indicator for how good is my model using out of sample data and/or cross validation, and my interpretation for the Forecasting Performance number is that it is the same as Coefficient Correlation, but for my current exp. I am getting different number, as I managed to dump to the output results into excel sheet, and I measured the CC, I found it is 10% absolute better than the forecasting performance number!
I don't know if this is a bug or something?
Any tip experts?