) -- "Sell in May and Walk Away" didn't work this year. Through May 30, the

Dow Jones Industrial Average


S&P 500

are basically up 3%.

Now investors are wondering whether the recent volatility in Japanese markets is foretelling the future of U.S. markets.

After last October's initiation of "Abenomics", the quantitative easing-like monetary policy championed by Japanese Prime Minister Shinzo Abe, the Nikkei has rallied some 50%.

However, after pushing the Bank of Japan to raise its inflation target to 2%, the Abe plan is meeting market resistance, and the faults are becoming visible.

The problem with the 2% inflation target is that Japanese banks, which hold an enormous amount of Japanese government bonds, likely will come under severe capital pressures as this occurs.

Also see: Japanese Markets Overshoot Expectations >>

The thesis is that as inflation rises, interest rates will as well; meaning bond values will drop, causing balance-sheet issues for the banks.

Although this thesis is sound, I believe it is incomplete and ignores several key facts:

    Japan is still stuck in a deflationary cycle, and the May 30 Japanese CPI and PPI data showed this very clearly.

    Although comparisons are plentiful, U.S. monetary policy in its totality is very different than that of Japan.

    And perhaps most significantly, U.S. banks don't own a lot of U.S. Treasuries or TIPS.

    Unlike U.S. banks, Japanese bank holdings in longer-dated JGBs have swelled to astronomical levels and thereby have created a significant problem for the central bank, unnerving markets.

    Notwithstanding, even a relatively mild rise in interest rates could have a dramatic impact on bank and insurance company balance sheets, especially once mark-to-market rules (part of the Basel III and Simpson-Bowles reforms) come into effect in 2014.

    Also see: Japanese Bonds Are Key to Abenomics Watch >>

    As a result of having a zero interest rate policy for more than a decade, regional Japanese banks and insurers already mark to market, and are therefore very susceptible to a rise in interest rates.

    Investors do not need to panic and should not view this as a broad-market sell signal. Rather, this is a real-time case study of how equity markets react to a rising interest rate environment.

    Based on this, we will be monitoring the reaction of various market segments within the Japanese equity markets in an attempt to provide us with better insights as to how U.S. markets may react if or when the

    Federal Reserve

    begins to exit its current easing strategy.

    Will small-cap value stocks, which tend to have very little debt exposure, dominate in this market cycle? Or will large-cap stocks with fortress-like balance sheets be a safe haven?

    History tells us that companies with stretched valuations tend to fare worst in a market decline, a cycle we are sure will repeat itself. The good news for investors is that we believe there will be a meaningful shift in domestic monetary policy this year.

    Also see: Can 10 Squat-Thrusts a Day Improve Your Bottom Line? >>

    In spite of the banter and worrying, there are no signs (unfortunately) that our economy is strong enough to continue its expansion course without help from the Fed. Moreover, Europe and Australia are still in monetary easing mode, making a turn in our policy less likely.

    Follow @Opursche

    This article is commentary by an independent contributor, separate from TheStreet's regular news coverage.

    Oliver Pursche is the president of GGFS, a boutique money management firm headquartered in Suffern, NY. Pursche is in charge of all business operations and serves on the firms' Investment Committee, Executive Committee and Board of Directors. Pursche is also a co-portfolio manager of the GMG Defensive Beta Fund (MPDAX).

    Over the course of his career, Pursche has had the pleasure of working for venerable firms, such as PaineWebber and Neuberger Berman, as well as taking graduate courses at the University of Pennsylvania's Wharton School of Business. Most recently, Pursche published his first book,

    Immigrants: Unleashing the Economic Force at our Door


    Pursche is a trilingual financial services executive with more than 20 years of industry experience. His professional focus is on improving organizational structures and efficiencies, particularly in sales and the sales & marketing area. In the case of GGFS, Pursche helped four-fold AUM and five-fold revenues, as well as double profit margins from 2005 to 2013. Pursche accomplished this mainly through sales coaching, re-engineering the marketing processes and having an absolute focus on ROI.

    Pursche is a frequent guest on



    Fox Business News


    Bloomberg Television

    . He also writes weekly columns for

    The Wall Street Journal Trading Deck





    The Street


    Pursche serves on the Advisory Board of the Cherie Blair Foundation

    , which focuses on helping women entrepreneurs around the world. He is a member of the New York City Ballet Serenade Society and a member of the Advisory Board at Gemini Fund Services.

    Pursche lives in Fairfield, CT with his wife Virginia and their two dogs. For a more complete biography, visit

    . Follow him on twitter @opursche