Over-the-counter market for cryptocurrency grows after authorities close exchanges.
Chinese investors are still trading bitcoin and buying initial coin offerings, suggesting authorities in Beijing are struggling to clamp down on cryptocurrencies just weeks after announcing that public exchanges would be shut down.

Observers feared the closure of Chinese exchanges would lead to a sharp drop in demand for bitcoin, given China has been a key source of demand. Instead, more of the buying and selling of cryptocurrencies has gravitated towards the private over-the-counter market.

Bitcoin, the best known cryptocurrency, has set a series of records in recent weeks. At the same time, the renminbi share of OTC bitcoin trading has risen from about 5 per cent at the beginning of September, before exchanges were shut, to about 20 per cent a month later, according to data cited in a report by the National Committee of Experts on Internet Financial Security, a government-backed research group.