Speculation Index
A ratio comparing the volume of trades upon the American Stock Exchange and the NYSE.
Investopedia Commentary
Many of the shares transacted on the AMEX are small cap and speculative. Therefore, when the volume on the AMEX is relatively higher than that of the NYSE, it is considered to be a sign of increasing speculation in the markets.
See also: AMEX, Confirmation, Member Short Sales Ratio, Mutual Fund Liquidity Ratio, NYSE, Sentiment Indicator, Specialist Short Sale Ratio, Technical Analysis