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发表于 2010-9-17 03:41 PM
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Come from textbook:
Block Uptick-Downtick Ratio, about 50 percent of NYSE volume comes from block trading by institutions. The exchange can determine whether the price change that accompanied a particular block trade was higher or lower than the price of the prior transactions. A block trade price above the prior transaction price, is referred to as an uptick and is assumed to be initiated by a buyer; a block trade price below the prior transaction price is
referred to as a downtick and assumed to be initiated by a seller. This led to the development of the uptick (buyers)-downtick (sellers) ratio, which indicates institutional investor sentiment.
This ratio generally has fluctuated in the range of .70, which indicates an oversold condition that is bullish, to about 1.10, which indicates an overbought environment and a bearish sentiment. |
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