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馬克•塞勒爾（Mark Sellers）曾經説過，能構成偉大投資者的 “護城河（moat）” 包括七種特質（7 traits great investors share)：

1. The ability to buy stocks while others are panicking and sell stocks while others are euphoric.

在他人恐慌時果斷買入股票，而在他人盲目樂觀時賣掉股票的能力。

2. Being obsessive about playing the game and wanting to win.

極度着迷於投資這個遊戲中，並有着極強獲勝欲。

3. A willingness to learn from past mistakes.

從過去所犯錯誤中吸取教訓的強烈意願。

4. An inherent sense of risk based on common sense.

基於常識的與生俱來的風險嗅覺。

5. Confidence in their own convictions and stick with them, even when facing criticism.

對自己的想法懷有絕對的信心，即使在面對批評的時候。

6. Important to have both sides of your brain working, not just the left side.

左右腦都擅長。

7. The ability to live through volatility without changing your investment thought process.

即使大起大落絲毫不改變投資思路的能力（最重要同時最少見的特質）。