, wavelet correlation, and variance - in a unified manner. It covers important topics in finance, such as portfolio asset … -- Periodic boundary -- Reflection boundary -- Brick wall condition -- 1.4 Wavelet Variance, Covariance and Correlation -- 1 ….4.1 Wavelet variance -- 1.4.2 Wavelet covariance and correlation -- 1.4.3 Cross wavelet covariance and correlation -- 1.5 Long …