Definition. IBIT Call-Put Delta Skew (Delta 20) is the model-interpolated implied-volatility skew between 20-delta calls and 20-delta puts on the IBIT ETF, reported by tenor. Each datapoint is the difference between call IV and put IV at target delta 20.

Technical. Values are projected onto standard tenors. The skew is unnormalized and expressed directly in IV points as call minus put.