One of the biggest threats is the rise of "zombie companies." Since the "recovery" started, zombie firms have increased from 7.5% to 10.5%. In Europe, BofA estimates that about 9% of the largest companies could be categorized as "walking dead."
What is a zombie company? It is — in the BIS definition — a listed firm, with ten years or more of existence, where the ratio of EBIT (earnings before interest and taxes) relative to interest expense is lower than one. In essence, a company that merely survives due to the constant refinancing of its debt and, despite re-structuring and low rates, is still unable to cover its interest expense with operating profits, let alone repay the principal.
This share of zombie firms can be perceived by some as "small." At the end of the day, 10.5% means that 89.5% are not zombies. But that analysis would be too complacent. According to Moody's and Standard and Poor's, debt repayment capacity has broadly weakened globally despite ultra-low rates and ample liquidity. Furthermore, the BIS only analyses listed zombie companies, but in the OECD 90% of the companies are SMEs (Small and Medium Enterprises), and a large proportion of these smaller non-listed companies, are still loss-making. In the Eurozone, the ECB estimates that around 30% of SMEs are still in the red and the figures are smaller, but not massively dissimilar in the US, estimated at 20%, and the UK, close to 25%.