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2. Currency strength - Wikipedia

   en.wikipedia.org/wiki/Currency_strength

   Currency strength. Currency strength expresses the value of currency. For economists, it is often calculated as purchasing power, [1] while for financial traders, it can be described as an indicator, reflecting many factors related to the currency; for example, fundamental data, overall economic performance (stability) or interest rates. [2][3 ...

3. Triangular arbitrage - Wikipedia

   en.wikipedia.org/wiki/Triangular_arbitrage

   Triangular arbitrage opportunities may only exist when a bank's quoted exchange rate is not equal to the market's implicit cross exchange rate. The following equation represents the calculation of an implicit cross exchange rate, the exchange rate one would expect in the market as implied from the ratio of two currencies other than the base currency.

4. Pearson correlation coefficient - Wikipedia

   en.wikipedia.org/wiki/Pearson_correlation...

   Pearson's correlation coefficient is the covariance of the two variables divided by the product of their standard deviations. The form of the definition involves a "product moment", that is, the mean (the first moment about the origin) of the product of the mean-adjusted random variables; hence the modifier product-moment in the name.

5. Correlation trading - Wikipedia

   en.wikipedia.org/wiki/Correlation_trading

   Correlation trading. In finance, correlation trading is a strategy in which the investor gets exposure to the average correlation of an index. The key to correlation trading is being able to predict when future realized correlation amongst the stocks of a particular index will be greater or less than the "implied" correlation level derived from ...

6. Correlation - Wikipedia

   en.wikipedia.org/wiki/Correlation

   The correlation reflects the noisiness and direction of a linear relationship (top row), but not the slope of that relationship (middle), nor many aspects of nonlinear relationships (bottom). N.B.: the figure in the center has a slope of 0 but in that case, the correlation coefficient is undefined because the variance of Y is zero.

7. Spearman's rank correlation coefficient - Wikipedia

   en.wikipedia.org/wiki/Spearman's_rank_correlation...

   In statistics, Spearman's rank correlation coefficient or Spearman's ρ, named after Charles Spearman [1] and often denoted by the Greek letter (rho) or as , is a nonparametric measure of rank correlation (statistical dependence between the rankings of two variables). It assesses how well the relationship between two variables can be described ...