It’s oil and gas. Whole segment is beaten down. Even though they are not pure commodity price based, they get hammered when oil tanks. Even plays like WMB, which is very gas heavy and has mostly locked-up fee based revenue, gets hit hard when oil tanks because they just get lumped in with the rest.
I doubt you see Pre Covid prices on OKE (or XOM or any others for that matter), but a nice dividend and modest price recovery is good enough for me.
Edit: With OKE (or WMB, kinder, energy transfer, etc) there is a risk that the producers that deliver into their pipeline networks go belly up. That risk is very real and has been happening, but for the most part that doesn’t account for 60+% of their portfolio, and the stock has been beaten down that much or more. For reference, WMB reported Q2 and were basically flat compared to last year...even in the face of this. So I generally think there has been an overreaction.