HDTFA: Historical Data Test Forecast Accuracy
Historical Data Test Forecast Accuracy (HDTFA)
represents the average accuracy of the forecasting
methods when tested against historical data.

For example, a HDTFA of .5% for a home price forecast
suggests that interest rates will be, on average, within
.5% of the forecast. So, an interest rate forecast of 10%
with a HDTFA of .5% suggests that rates will, on
average, be between 9.5% and 10.5% during the target
month. (10% - .5% = 9.5%; 10% + .5% = 10.5%)
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