The bitcoin markets were frothing last week as the price soared to a high of $458 on Thursday. Trading volumes more than doubled as markets were stimulated by the surging price.

Volumes rose by 2.3 times to nearly 6m BTC traded over the last seven days, compared to a week earlier. The stage was set for a price surge a week ago, as the markets digested the news of the inter-continental dark markets bust called Operation Onymous.

In the last week, prices swung a massive $97.57 from a trough on 11th November to a peak two days later. The price rose from $360.58 at the week's bottom to $458.15 at its top, according to the CoinDesk Bitcoin Price Index.

There has been plenty of price action, then –  not that you would know it by looking at the week's closing prices. The bitcoin price opened the week at $360.29 on 10th November and closed ay $388.55 on 16th November, representing a rise of 7.84%.

The price movement was backed by robust trading volumes across a range of exchanges. BTC China reported a trebling in volume, while Bitfinex recorded an increase of nearly double the amount, compared to a week earlier. BTC-e showed trading volume growth of 128%, while OKCoin and Bitstamp both showed rises of 117%.

The fact that exchanges across the board reported strong volume growth is an indicator of the bitcoin markets' health. The current bitcoin price surge appears to be well-supported.

While the bitcoin price may have seen some serious price action last week, it didn't compare to the kerfuffle around Huobi's futures market.

Here's how Huobi told it: It turns out an enthusiastic trader had taken advantage of Huobi's newly introduced high-leverage margin accounts, which offers leverage of up to 20-times. The trader went long on a weekly futures contract at a price of 3,000 CNY. The market moved against him and he had to close his position at 2,817.76 CNY.

That would have been the end of it, but Huobi's futures market didn't have enough liquidity to fill the orders at that price. Plus, lots of other highly leveraged positions were facing margin calls. The price kept tumbling. The order was finally filled at 2,378.72 CNY, or more than 400 CNY below the intended price. This resulted in 3,032 BTC of unintended losses.

The exchange then spread those losses across traders on its platform, effectively forcing them to take a haircut of 46.1% on their trading profits. Huobi said it would reimburse affected traders by giving them credit on the platform.

BitMEX

founder Arthur Hayes, who is launching his own derivatives exchange on 24th November, was quick to write to CoinDesk, pointing out that his platform bears all the risk for its products, meaning it would not force its users to take a loss because of a wonky market.

Hayes wrote in an email:

Hayes also pointed out an intriguing arbitrage opportunity in his weekly trading newsletter. He calculated the price deviation on major non-Chinese exchanges from the global average from 11th to 14th November. He then compared this to the price offered on OKCoin over the same period.

Arbitraging between exchanges in China and outside the country has been lucrative in the past. This time, Hayes found that non-Chinese exchanges, like BTC-e, were offering discounts of more than 10% of the BTC global average spot price, while OKCoin was offering a premium of 20% at the same time. That's a spread of 30 points.

The arbitrage opportunity lasted for 24 hours, Hayes wrote, although he noted that only traders with funds already sitting on the exchanges would have been able to take advantage of the opportunity.

Speaking of OKCoin, the exchange's CTO Changpeng Zhao claimed his company had signed on a massive new client: a hedge fund with €3bn under management that had begun to trade on its platform. The exchange hasn't provided evidence of this whale of a trader yet.

Coincidentally, CoinDesk does know of a hedge fund, located in the favoured neighbourhood for such outfits, London's Mayfair, that is looking into the cryptocurrency space. But it hasn't said anything about trading on OKCoin, or indeed any exchange, yet. Watch this space for more details as we get them.

Pantera Capital's monthly research note came out a couple of weeks ago. It contains some reassuring analysis of the bitcoin price.

The research observed that bitcoin had a hit a new low below the 200-day moving average on 5th October. Of course, that was just before the current price run-up in the wake of Operation Onymous.

The note also found that bitcoin bull cycles returned, at a minimum, more than triple the amount invested. The most profitable bull-run it has recorded were the 66 days from 5th April 2011, when it returned 44-times the invested capital. The price then rose from $0.67 to $29.58.

Disclaimer: This article should not be viewed as financial advice. Please do your own extensive research before making investment decisions.

Featured image via P22earl / Flickr