-Jane Foley is research director at Forex.com. The opinions expressed are her own.-

The discrediting of the efficient markets theory in the aftermath of the financial crisis appears to have been accompanied with growing support for the view that rather than efficient in nature, financial markets are predisposed towards the formation of bubbles.

A bubble can simply be defined as an occurrence that begins when the price of an asset has been driven significantly above it "fair" value. According to the efficient markets theory this would not happen.

If bubbles are a natural outcome of financial market activity it is relevant to ask whether the very loose fiscal and monetary policies of many central banks and governments are presently sowing the seeds of the next bubble.

Even though the real economies of the U.S., UK, Eurozone and Japan continue to be defined by expectations of rising unemployment and falling real wages, access to cheap money has already helped restore the profitability of many investment banks.

In turn, this has fed risk appetite which is evident in the rally in stocks since the spring, increased demand for "risky" currencies and a recovery in commodities prices. Brent oil has rallied by 128 percent from its 2009 low. The ability of oil to rally despite the existence of oil supplies well above the seasonal average suggests there is already speculative element in this market which could be in danger of driving prices above their fair value.

This week’s meetings of the Federal Reserve, the Bank of England and the European Central Bank have focussed attention not so much on rates, but on the extraordinary policy decisions taken by these central banks in the wake of the financial crisis and whether conditions are ripening in favour of a gradual withdrawal of some of these policies.

The Fed last week ended its $300 billion treasury bond purchasing plan, though it will carry on buying mortgage backed securities. The Bank of Japan last week announced that it will stop buying corporate bonds at year end. The Reserve Bank of India also removed emergency support measures last week.

This week there is speculation that the ECB could announce that it will hold no more 12-month cash tenders next year. By contrast the Bank of England is expected to increase quantitative easing at the November 5, Monetary Policy Committee meeting. Supporters of quantitative easing continue to stress that the lack of clear inflation pressures suggests there is room for these plans to be extended.

However, the lack of response in either money supply or inflation indices could equally be illustrating that these plans are not having a significant impact on the real economy and are therefore no longer appropriate. The paring back of these plans are likely to have an impact on the ability of some banks to turn an easy profit and thus should rein in risk appetite and limit speculative and "bubble" forming activity.

Unfortunately, a bubble can only be truly confirmed after it has burst; a characteristic with clear destabilising consequences. If bubbles are natural phenomena within financial markets, the need for tighter regulation and ongoing reviews of processes that oversee the financial system are absolutely necessary.

This conclusion, while in complete contrast to the implications of the efficient markets theory, ties in very well with the political desire to reform the banking regulatory framework in order to protect the tax payer from future hefty bank bail-out costs. The banking landscape, while already vastly different from just two years ago could continue its transformation for years.

researchEMEA@forrex.com

– Wei Gu is a Reuters columnist. The opinions expressed are her own –

Everyone agrees that China’s economy must be rebalanced, but few have bothered to delve into the costs. Japan’s experience has shown that even well-meant changes could sow the seeds for a bubble.

China cannot stay with its current economic model forever. But as the economy has become extremely unbalanced, to some extent even more so than Japan’s in the 1980s, rocking the boat too much risks tipping it over. Instead of rushing into changes, it would be better to make reforms gradually.

Most observers believe an extremely loose monetary policy was the root cause of Japan’s bubble. But Tomo Kinoshita, an economist at Nomura, reckons that efforts to liberalise the economy, such as sharply revaluing the yen, developing a deeper bond market and deregulating interest rates were among the fundamental reasons behind the bubble.

The challenges facing China’s economy are similar to those seen in Japan in the 1980s. Foreigners are calling for a currency revaluation because the undervalued yuan gives China’s exports an extra boost. Capital markets need to play a bigger role because investment has been directed mostly by state-owned banks.

True, property price increases appear to be milder than in the Japan of the 1980s. Household loans only account for 30 percent of disposable incomes in China, versus about 90 percent in Japan in 1989, according to Nomura. But there are warning signs. New mortgages recently hit a record. And ratings agency Fitch has cited China’s property market as a cause for concern.

The Chinese stock market also looks less overvalued than Japan’s did. The ratio of Chinese stock prices to earnings is only a third of the peak levels reached in Japan. Stock market capitalization as a percentage of GDP is 62 percent, much lower than Japan’s 150 percent at end of 1989. But China is catching up fast, and the ChiNext market, China’s long-awaited Nasdaq-style market, debuted last week with a speculative surge.

Moreover, China has been more aggressive in terms of monetary easing as it tries to prop up the economy while waiting for exports to return. The broad money supply in China has been rising at almost 30 percent this year, twice as much as in Japan back in the 1980s. So if there is a bubble, it could grow bigger than the one in Japan.

Even much-needed efforts to liberalise and rebalance the economy may lead to asset price inflation. Similar to China, Japan’s banks were too big and small companies had trouble getting financing. So developing a corporate bond market and encouraging banks to lend more to small firms was seen as a healthy change.

But policymakers underestimated the negative impact on banks. After Japan developed a liquid corporate bond market, large corporations issued cheap equity-linked bonds to repay bank loans. Because Japanese financial institutions lacked other revenue sources, they targeted smaller corporations and consumers. Total bank loans made to small- and medium-sized companies and individuals rose to 71 percent of total loans in the late 1990s from 47 percent in the late 1980s.

Due to a lack of information on their new clients, the banks’ bad loans started to rise. Their lending standards deteriorated as they scrambled to make up for lost business. This could very well happen in China as the country encourages consumers to take on more debt to stimulate domestic demand.

Moreover, Kinoshita argues that in Japan interest rate deregulation “put a cat amongst the banking pigeons” because banks were forced to lend out more when their margins became compressed due to more competition. Pressure from the United States played a role, and the Japanese authorities were eager to internationalize the yen anyway. Letting banks set deposit and lending rates was one of the requirements for the yen’s internationalization.

The policy lesson for China is that when Beijing takes business away from banks, it needs to balance things out by allowing them to take on new business, such as securities underwriting and broking.

But that leads to the question of how to compensate securities firms for their lost business and prevent them from engaging in reckless behavior. This just underscores the complexity of China’s problems.

Most of the world believes that China risks moving too slowly, not too fast. President Barack Obama might give Chinese leaders another ear bashing during his upcoming trip to China. But without the right systems in place, big bang reforms could be disastrous. It is important that China, as well as the rest of the world, learns from Japan’s mistakes.