Null hypothesis: the variable have a unit root
At Level
		SPOT_PRICE	FUTURE_PRICE_CONTRACT
With Constant	t-Statistic	−1.3182	−1.0256
With Constant	Probability	0.6229	0.7458
With Constant & Trend	t-Statistic	−2.3664	−3.7908
With Constant & Trend	Probability.	0.3971	0.0174**
Without Constant & Trend	t-Statistic	−0.0201	0.9917
Without Constant & Trend	Probability	0.6759	0.9155
At First Difference
		D (SPOT_PRICE)	D (FUTURE_PRICE)
With Constant	t-Statistic	−34.7189	−29.3372
With Constant	Prob.	0***	0***
With Constant & Trend	t-Statistic	−34.7024	−29.3349
With Constant & Trend	Probability	0	0
Without Constant & Trend	t-Statistic	−34.7373	−29.3111
Without Constant & Trend	Probability	0***	0***