During the current commodity supercycle, there have been occasions-too many to count-when investor psyche has been damaged by reports about slowing U.S. growth, a hard landing in China or a debt crisis in Europe.

Yet just behind the gloom, significant and positive trends are taking hold, causing the storms to start dissipating.

I often say that government policies are precursors to change, which is why we follow the monetary and fiscal actions closely as they can have a significant impact on asset prices.

You have to go back about 16 months when Brazil kicked off the latest global easing cycle by cutting interest rates by 50 basis points. Since then many developing countries such as the Philippines, China and Colombia, as well as developed nations of Japan, the European Central Bank, the U.S. and the U.K. have joined forces in a world-wide synchronized stimulation of the economy.

Last summer, Mario Draghi indicated that the ECB would do "whatever it takes" to save the euro. In the fall, the Federal Reserve agreed to buy $85 billion a month in Treasuries and mortgages, amounting to $1 trillion a year.

And just recently, Japan announced that, in addition to pumping $1.1 trillion into the markets through 2013, the central bank will keep an open-ended approach to buying assets through 2014.

Historically, central banks' policy actions occur after there's been some economic deterioration. Several months later, the stimulative measures work their way through the global economy.

This has been the case with China, which has been showing remarkable improvement in its export-oriented HSBC Purchasing Managers Index. The PMI is a measure of health of companies in China, as it includes output, new orders, employment and prices across numerous sectors.

This month, the Flash PMI came in at 51.9, beating market consensus, which was at 51.7. The PMI stands at a two-year high, as you can see in the chart below.

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