?url_ver=Z39.88-2004&rft_id=10.1177%2F2158244019850243&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Ali&rft.au=Ali%2C+S.&rft.aufirst=S.&rft.issue=2&rft.atitle=Symmetric+and+Asymmetric+GARCH+Estimations+and+Portfolio+Optimization%3A+Evidence+From+G7+Stock+Markets&rft.volume=9&rft.title=SAGE+Open&rft.issn=21582440&rft.date=2019&rft.genre=article