Trade only in active stocks. Keep out of slow, dead ones.

只在活跃的股票中交易。避免介入运动缓慢、成交稀少的股票。

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Thus, a low-volume ETF tracking active stocks can be more resilient to buying and selling than it might appear.

WSJ: No Need to Avoid All Low-Volume ETFs

Beginning 16 years ago with the most active stocks, securities authorities required over-the-counter marketmakers to electronically display bids and offers that bettered their own quotes.

FORBES: O-T-C Trading for Experienced Investors

During bull markets, the Active Bear fund seeks stocks it believes will underperform.

FORBES: Still Bearish On The Market? Here Are Several Stocks That The Bears love To Hate