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  3. When Robert Shiller, a Yale economist and bestselling author, told a crowd of

When Robert Shiller, a Yale economist and bestselling author, told a crowd of

游客2023-12-15  20
问题    When Robert Shiller, a Yale economist and bestselling author, told a crowd of finance professors and economics students last spring that only 10 percent of his money was invested in stocks, they gasped.
   Managers might suggest anywhere from 50 to 90 percent. But 10 percent? This was heresy.
   How about 0 percent?
   That’s the share that investors should plow into domestic stocks, according to Ben Inker, director of asset allocation for Grantham, Mayo, and Van Otterloo & Co. (GMO), a money-management firm with some $85 billion in assets.
   Welcome to a contrarian view of today’s equity markets. A small but vocal band of heretics is calling into question not only the profit potential of stocks but also the foundation for conventional wisdom about investing. Even for those who disagree with them, their arguments serve as a reality check for the market.
   Are conventional portfolios really as safe as experts say?
   "Don’t be surprised that the Wall Street brokerage firms spend most of their time telling you that stocks are cheap," warns Mr. Inker. "Wall Street likes the market. It likes trading. Wall Street makes a lot more money off of trading stocks than trading bonds."
   The trick is to determine your portfolio’s exposure to risk, analysts say. And that depends to a surprisingly large degree-on how diversified it is and how long you’re prepared to stay the course. These are key elements of "modern portfolio theory,", which came into being in the 1950s and eventually won its creator, Harry Markowitz, a Nobel Prize.
   Essentially, portfolio theory holds that investors reap the greatest return with the least risk when they allocate their money among diverse classes of assets, hold them for the long term, and rebalance the portfolio when the various classes of assets stray too far from their original allocation.
   To make it work, you need to own asset classes that don’t move in lock step, make accurate estimates of their future returns, and use a very long time horizon. A miscalculation in even one of these steps, however, can seriously hurt the prospects for reaching your ultimate goal.
   "The long-term nature is the driving force of the portfolio," says Jerry Korabik, vice president of Ibbotson Associates, a Chicago-based asset allocation adviser. "All of our clients are institutions, and we develop portfolios with 10-, 20-, even 30-year time horizons."
   Riding the roller coaster
   Thus, investors should never try to get in and out of the market at specific times, the theory holds. Instead, they should ride the inevitable ebb and flow of prices. If they have allocated their money correctly, some portion of their portfolio will almost always be making money. By rebalancing their portfolios periodically-selling off some of the winning asset classes and buying more of the losers- they are continually buying low and selling high, at least in a relative sense.
   This buy-and-hold strategy has won over hordes of investors. The average Fidelity retirement account has nearly 60 percent of its money in stocks, a recent study found. The overall average for retirement accounts: 61 percent, according to the Employee Benefit Research Institute. Even equity allocations for college and university endowments hover around 57.1 percent, says the National Association of College and University Business Officers.
   The problem is that investors sometimes have to be extraordinarily patient for the strategy to pay off. In 1981, for example, the S&P 500 Index stood at the same level it first achieved in 1965. Today, the index is about 30 percent lower than its peak in 2000. Do investors really have to put up with such long periods of losses?
   Profits of impatience
   No, say a small contingent of money managers. By avoiding the stock market as their primary engine for profit during the past five years, several of these managers have posted good returns.
   Take the Permanent Portfolio Fund. Unlike many balanced funds, which diversify primarily between stocks and bonds, it encompasses a much wider variety of assets: 20 percent gold bullion and coins, 5 percent silver bullion and coins, 10 percent Swiss franc denominated assets (typically Swiss government bonds), 15 percent US and foreign real estate and natural-resource company stocks, 15 percent aggressive-growth stocks, and 35 percent in dollar assets (Treasury securities in varying maturities and also short-term, high-grade bonds).
   Over the past five years, while the S&P 500 has slipped backward, the Permanent Portfolio Fund has averaged a startling 10.1 percent growth per year.
   "We don’t correlate to any index because we own different assets," says the fund’s manager, Michael Cuggino. "In markets where stocks and equities are going sideways or down, we perform very well because our diversification is much broader. If equities go gangbusters like in the 90s, clearly we are going to underperform because we won’t be totally in stocks."
   Indeed, the fund lagged significantly during the boom years of the 1990s, causing average annual returns for the decade to trail the S&P 500 by four percentage points.  [br] According to "modem portfolio theory", we should ______.
选项 A、buy one single kind of stocks
B、buy stocks whose prices fluctuates at the same pace
C、never sell our stocks
D、sell stocks whose prices go relatively too high in our portfolio
答案 D
解析 根据“现代投资组合理论”，我们应当采取何种投资策略?现代投资组合理论认为投资者可以以最小的风险获取最大的收益——长期持有不同类型的资产，并在各种类型的资产过度偏离原始价位时调整投资组合。应当持有表现不同步的不同资产类型，并以长期的视野估量资产的未来回报。
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