Markets rally, then pull back after Trump and Iran give conflicting reports of talks

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Volatility-adaptive discounting. Rather than using constant discount factors α and β for cumulative regrets (as in DCFR), VAD-CFR monitors learning volatility via an Exponential Weighted Moving Average (EWMA) of immediate regret size. High volatility increases discounting to quickly discard unstable past data; low volatility preserves more history. The EWMA decay rate is 0.1, with base α = 1.5 and base β = −0.1.

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