Oil futures going below zero makes sense to me really.

Oil continues to be extracted, because it costs a lot of money to stop, conserve and then restart oil rigs, from what I read.

Storing oil without selling it bears its costs too. Is it more than $40 per barrel per month? Normally I'd say certainly not, but what if storage capacity becomes a premium?

We will certainly live interesting times... In Chinese, that's a curse. :D