This study has been done on the closing prices of the nearby WTI futures contracts and their underlying spot prices. After dividing the entire sample period into 5 subsamples using ‘dynamic programming algorithm’ presented in Bai and Perron(2003), I applied Threshold Vector Error Correction Models to each subsample. To analyze investors arbitrage behaviors in different market situations, I defined the state of the market as backwardation or contango by the relationship between futures and spot prices, and made investigations with 3-regime TVECM using basis as a threshold variable.
Keywords:Threshold Vector Error Correction Models, Nonlinearity, Structural Breaks, Regimes, Crude Oil Spot and Futures Prices

