Text this: Capital asset pricing model using copula based sur for interval-valued energy index

 _    _     _____     _____     ______    _  _   
| \  / ||  |  ___||  /  ___||  /_   _//  | \| || 
|  \/  ||  | ||__   | // __     -| ||-   |  ' || 
| .  . ||  | ||__   | \\_\ ||   _| ||_   | .  || 
|_|\/|_||  |_____||  \____//   /_____//  |_|\_|| 
`-`  `-`   `-----`    `---`    `-----`   `-` -`