one is the altmann d, ultimate measure, five key parts that look at short-term liquidity, profitabilityurn on assets, market value and their turnover, when we look with help from goldman sachs, 66 energy company bankruptcies over the last ten years, altmann z score, highly predictive of that bankruptcy, we think this is a very good measure of solvency risk for this industry. the second measure we looked at was a measure of operating cash flow minus capex over total assets. this is giving us a sense of how the company may be spending it's operating cash. is it spending this on capex to develop new assets and acquire new reserves they might not bring to market or using it for other purposes, paying down debt, paying dividends, doing share buy backs or keeping cash reserves. so those are the sort of seven metrics we ended up on in four categories. the goal here is that looking at each of these four categories we can get a holistic, comprehensive view of climate risk. before we apply the framework, we did consult with a wide range of industry experts to really validate our thinking, validat