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Contrarian Investing is an investment strategy that is characterized by purchasing and selling in contrast to the prevailing sentiment of the time.〔(【引用サイトリンク】 title=Contrarian )〕 A contrarian believes that certain crowd behavior among investors can lead to exploitable mispricings in securities markets. For example, widespread pessimism about a stock can drive a price so low that it overstates the company's risks, and understates its prospects for returning to profitability. Identifying and purchasing such distressed stocks, and selling them after the company recovers, can lead to above-average gains. Conversely, widespread optimism can result in unjustifiably high valuations that will eventually lead to drops, when those high expectations don't pan out. Avoiding (or short-selling) investments in over-hyped investments reduces the risk of such drops. These general principles can apply whether the investment in question is an individual stock, an industry sector, or an entire market or any other asset class. Some contrarians have a permanent bear market view, while the majority of investors bet on the market going up. However, a contrarian does not necessarily have a negative view of the overall stock market, nor do they have to believe that it is always overvalued, or that the conventional wisdom is always wrong. Rather, a contrarian seeks opportunities to buy or sell specific investments when the majority of investors appear to be doing the opposite, to the point where that investment has become mispriced. While more "buy" candidates are likely to be identified during market declines (and vice versa), these opportunities can occur during periods when the overall market is generally rising or falling. ==Similarity to value investing== Contrarian investing is related to value investing in that the contrarian is also looking for mispriced investments and buying those that appear to be undervalued by the market. Some well-known value investors such as John Neff have questioned whether there is a such thing as a "contrarian", seeing it as essentially synonymous with value investing. One possible distinction is that a value stock, in finance theory, can be identified by financial metrics such as the book value or P/E ratio. A contrarian investor may look at those metrics, but is also interested in measures of "sentiment" regarding the stock among other investors, such as sell-side analyst coverage and earnings forecasts, trading volume, and media commentary about the company and its business prospects. In the example of a stock that has dropped because of excessive pessimism, one can see similarities to the "margin of safety" that value investor Benjamin Graham sought when purchasing stocks—essentially, being able to buy shares at a discount to their intrinsic value. Arguably, that margin of safety is more likely to exist when a stock has fallen a great deal, and that type of drop is usually accompanied by negative news and general pessimism. Along with this, although more dangerous, is shorting overvalued stocks. This requires 'deep pockets' in that an overvalued security may continue to rise, due to over-optimism, for quite some time. Eventually, the short-seller believes, the stock will 'crash and burn'. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Contrarian investing」の詳細全文を読む スポンサード リンク
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