prices down, gas is dependent on oil prices. oil prices are dependent on places like chain. we've seen the jitters in the storm because of the china's market crash, so xhin is growing more slowly. at the same time there's a lot of new supply coming online, so the u.s. has being a big shale oil and gas producer. that supply is out will. with iran signing this nuclear deal, there's the expect as more iranian supply will come on. both are pushing the price of gas lower. >> oil of course is the big driver. compared to $100 a b year. normally when prices fall like this, production does tee, but that doesn't seem to be happening. why not? >> that's an interesting geopolitical story. obvious times when prices plummet, you have the saudis, the world's biggest producers and defining member of opec,