Most real data and trends in economics and market are 'partially' memoriless [perhabs LM ] and deterministic. According to Abdul Rahman, Rosmanjawati & Jibrin, SanusiSanusi(2019) filtering "fractionally differences FURI process,... that exhibits a very slow decaying (unusual decay) ACF

" the approach of FURI filter was employed, & modeling using ARFURIMA - under a given restricting condition and assumption of strong correlation and 1

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