The biggest falls in brand values include oil and gas companies, still suffering from low commodity prices, and banks, which face growing competition from rival payment systems such as PayPal — whose brand value increased by 35 per cent (see story page 2).
Her device uses carbon nanotubes to detect the presence of lead. Thousands of US water systems are reportedly contaminated by lead.
A few recent scientific papers say that such long-lasting kinks in the jet stream have become more likely because global warming is rapidly melting the sea ice in the Arctic, but many leading scientists are not convinced on that point.
The first chart shows the total incidence of banking, currency and debt default crises in emerging markets since the 1970s, set against the nominal federal funds rate. Mr Koepke gives this as evidence that high and rising rates typically precede periods of EM crisis.
It uses its QQ chat application as a means to drive users to its online games and websites. Analysts say a similar model could work well for WeChat, though they also say that WeChat's Circles function adds a social networking component to the service that could eventually attract advertisers.
The 54-year-old has already said he wants Bain to be recognised as a go-to provider of digital expertise. The question is whether this will be achieved through acquisitions, poaching teams or retraining the existing workforce.