Earlier today, Macquarie released a must-read report titled "Further deterioration in China's corporate debt coverage", in which the Australian bank looks at the Chinese corporate debt bubble (a topic familiar to our readers since 2012) however not in terms of net leverage, or debt/free cash flow, but bottom-up, in terms of corporate interest coverage, or rather the inverse: the ratio of interest expense to operating profit. With good reason, Macquarie focuses on the number of companies with "uncovered debt", or those which can't even cover a full year of interest expense with profit.

The report's centerprice chart is impressive. It looks at the bond prospectuses of 780 companies and finds that there is about CNY5 trillion in total debt, mostly spread among Mining, Smelting & Material and Infrastructure companies, which belongs to companies that have a Interest/EBIT ratio > 100%, or as western credit analysts would write it, have an EBIT/Interest < 1.0x.

As Macquarie notes, looking at the entire universe of CNY22 trillion in corporate debt, the "percentage of EBIT-uncovered debt went up from 19.9% in 2013 to 23.6% last year, and the percentage of EBITDA-uncovered debt up from 5.3% to 7%. Therefore, there has been a further deterioration in financial soundness among our sample."