Janet Yellen might have the most powerful job in the world, as the Federal Reserve she now chairs controls what might be the world's most powerful printing press.

We take a closer look at what her reign might mean for investors' portfolios.

Yellen's half-pipe dream: Hope is not a strategy?

Serving on the Federal Open Market Committee (FOMC) in 2008 as president of the Federal Reserve Bank of San Francisco, Yellen has been praised for grasping the severity of the financial crisis early on. Leaving aside that 2008 was a little late to prepare for the crisis, let's try to find out what type of central banker Yellen is.

There's the dreamer. Back in 2003, the then head of the European Central Bank said: "We hope and pray that the global adjustment process will be slow and gradual." This served as the catalyst for us to re-engineer our investment advisory business — if central bankers revert to hopes and prayers, so I thought, it's time for investors to take precautions. The "global adjustment process" is a codename for the U.S. current account deficit. The "slow and gradual" is a thinly veiled reference to a possible U.S. dollar crash.

There's the ivory tower academic. Ben Bernanke, in turn, was a student of the Great Depression. He had a guiding philosophy: when faced with a credit bust, forcefully deploy monetary policy to reflate the economy. On various occasions, he emphasized that raising rates too early during the Great Depression was one of the biggest policy mistakes of the time. Our interpretation: the Fed all but promises to be late in raising rates, wants to err on the side of inflation. That's because, according to our interpretation of Bernanke's philosophy, taking the foot off the accelerator too early could cause deflationary forces to take over, undoing any "progress." We call it an ivory tower academic view, as the theory does not take into account the side effects, namely other bubbles, that might be created along the way. We further think the theory is altogether broken, as we believe monetary policy affects prices, but does not generate wealth.

There's the Yellen Fed. So what about the Yellen Fed? A couple of observations:

• Yellen is humorous. In the recently released transcript of the Dec. 16, 2008, FOMC meeting, she said: "An accounting joke concerning the balance sheets of many financial institutions is now making the rounds, and it summarizes the situation as follows: On the left-hand side, nothing is right; and on the right-hand side, nothing is left."

• In the Jan. 21, 2008, FOMC meeting, she was explicit about her concerns about the economy, stating: "I think the risk of a severe recession and credit crisis is unacceptably high."

• However, during the June 2008 FOMC meeting, she talked about raising interest rates: "I favor alternative B with the proposed wording. Given the forecast and the risks around it, our next move on the funds rate is likely to be up."

• During Yellen's confirmation hearings in late 2013 to become Fed chair, she stated the Fed might return to a more normal monetary policy when the economy is back to normal. We have pointed out that this is an oxymoron, as we don't think the economy can return back to normal when the Fed meddles with the price discovery process and the process of efficient capital allocation.

• Yellen is a labor economist and has taken keen interest in looking at unemployment numbers at a deeper level than just the headline unemployment numbers reported. During Yellen's testimony to the House this month, she consulted with colleagues when asked what the definition of a part-time employee is according to the number of hours worked. Given that different definitions are used by the Department of Labor and, for example, what is used in the Affordable Care Act, Yellen should be excused for consulting with colleagues when grilled by Congress and under oath; however, given that her home turf is the labor market, her hesitation did raise some eyebrows.

• Yellen is on record supporting a "modified Taylor rule" in setting monetary policy. Unlike the Taylor rule that defines the level of interest rates based on inflation, Yellen's preferred metric heavily emphasizes employment. However, during the above-mentioned testimony, she distanced herself from the modified Taylor rule. Yellen argued that a sensible approach requires a qualitative assessment given that the Taylor rule (or a modified Taylor rule) would have required negative nominal interest rates.

• Merk Senior Economic Advisor and former St. Louis Fed President Bill Poole has pointed out that, according to his recollection, Yellen has never objected to being called a monetary dove.

In trying to use a positive word to summarize these observations, let me choose the term "pragmatic." "Freestyle" may be another way of coining her approach to monetary policy. As her June 2008 comments suggest, however, her forecasts are not always right. And neither would one expect that from any human being.

Unfortunately it is fallible human beings controlling the printing presses of the world. When they make mistakes, it might have major implications. It's one reason why we believe printing trillions may not be prudent, because there just might be unintended consequences. Of course, no physical currency has been printed, but virtual currency is created literally with the stroke of a keyboard when the Fed buys Treasurys or mortgage-backed securities.

Here's the problem with a "freestyle" approach: the market doesn't like uncertainty. It's not aided by the fact that the Fed itself may be flying blind. That's because the Fed is manipulating its own gauges to assess the health of the economy. By buying Treasury securities throughout the yield curve (short-term, as well as long-term Treasurys), the Fed is looking itself in the mirror. Instead, the Fed has to look at backward looking indicators, i.e. read the tealeaves on unemployment numbers. That lack of certainty, the lack of predictable leadership, is fertile ground for volatility.

Is Yellen's freestyle approach hazardous to emerging markets?

As we discussed in more depth in a recent article, weak emerging markets might be the biggest victim of Yellen's freestyle approach. Lacking the liquidity of developed markets, an uptick in volatility might cause investors to run for a small exit. We have seen much of that unfold since last spring when the Fed "taper" talk first flared up. In a nutshell, countries that had major inflows of money when the Fed's policies were highly expansionary, but had few investment opportunities, saw a bidding up of local government securities. As the tide appears to have turned, it's comparatively easy to sell these securities — except, of course, that these markets aren't all that liquid to begin with, so any selling might cause significant headaches to investors.

The more advanced emerging markets are far better equipped to handle the volatility, as money was more likely invested in real projects. In our assessment, countries are better off that have features such as a reliable rule of law, a mature banking system, a domestic and offshore fixed-income market, sound monetary policy and a reliable regulatory environment. The more advanced Asian economies have many of these features.

Weaker countries like Brazil and South Africa might lose out; however, there may be exceptions among the weaker players. We are more positive on India, notably because of ongoing structural reform and comparatively low asset prices.

A country worth mentioning is China. The volatility of its currency, while still low compared with that of free-floating major currencies, has spiked, causing some hot money to run for the hills. However, the increased volatility is very much in line with the goals of China's foreign exchange regulator. Increased exchange rate volatility encourages the market to find an equilibrium rate at which there are buyers for every seller and sellers for every buyer, among non-central bank participants.

Can investors position their portfolio to win a medal?

In most events in the winter Olympics, skill and speed appear to be pre-requisites to win a medal. If skill corresponds to a high beta (risk) investment, anyone aiming at speed better have skill. Now think of Yellen altering your racecourse, except that she won't tell you the modifications she is making. To survive such a course, it might be prudent to slow it down a bit.

The challenge is that you are competing with others who have learned full speed is the way to win the course. Translating this to the world of investing, I believe it was fund manager John Hussman that first said, "The problem with bubbles is that they force one to decide whether to look like an idiot before the peak, or an idiot after the peak."

In our assessment, there is too much complacency in the markets (for an in-depth discussion on complacency, please read our Feb. 11, 2014, article). The stock market, as well as various economic indicators, very much build on asset price inflation the Fed has engineered. The trouble is that asset price inflation can evaporate rather quickly. The time to take the chips of the table is before, not after a bubble bursts.

If Facebook's acquisition of WhatsApp is not the sign of a bubble, I don't know what is. Keep in mind, however, the old market adage that markets can stay irrational longer than investors can stay solvent. As such, taking chips off the table might be prudent.

But if one does not participate in an event (if one is out of stocks), how can one win a medal?

A couple of thoughts to leave you with here:

• Warren Buffett was ridiculed for not investing in tech stocks in the 1990s. Yet, at the end of the day, he did just fine.

• In our assessment, investing is about finding values, not chasing trends. Those chasing trends are destined to invest at the top, only to lose money when markets correct.

• With central banks heavily engaged in the markets, asset prices may not reflect fundamentals. That's the bad news. The good news is that we think our policymakers are reasonably predictable. Even Yellen can be understood — she just might be tougher to read than Bernanke was. But studying her and other policymakers might provide clues to help position one's portfolio.

• The gold and currency markets may be the purest plays on what we call the "mania of policymakers." Gold may benefit as policymakers in the United States and abroad continue to "kick the can down the road," and currency investing may allow investors to stay a step ahead of the game in currency wars.

We manage the Merk Hard Currency Fund, the Merk Asian Currency Fund, the Merk Absolute Return Currency Fund, as well as the Merk Currency Enhanced U.S. Equity Fund.

Axel Merk, President & CIO of Merk Investments, LLC, is an expert on hard money, macro trends and international investing. He is considered an authority on currencies.