TY JOUR TI Stock market fluctuations simulation within lowly volatile and highly volatile periods KW ARMA-GARCH model KW Value-at-Risk (VaR) KW Average Value-at-Risk (AVaR) KW time series KW heavy-tailed distributions. JO Vestnik of Don State Technical University AU Kirillov, K.. PY 2013 IS 13 PB Don state technical University