Initially, after the PSX spinoff, PSX's pps jumped and easily outperformed COP and it's pps. However, things have changed. During the last 6 months, COP's pps has gained approx. 18% while PSX's pps has lost 13% of their respective values. When considering both COP and PSX, I consider that COP has much more potential in securing value for it's shareholders than does PSX. COP is the better of the two for future shareholder earnings. And COP pays a higher dividend also.