时间序列为股指期货对数收益率

假设t分布 拟合的GARCH（1，1）模型后，得到了公式。

[draw]a11i21d210218218216223216228a11i21f21122221722221f22222121a22121622021221e22022722c22b22f22ba11i235226237226a11i23821f23822b23a23323b23624523024522fa11i23522923822823c228a11i25921e26421c27221ca11i25d22726922726e227272227a11i29b21c29121b28922128a22c29122f29922f29c22fa11i2a82242b92212d1221a11i2bf2162bb21f2bb2272bb22ca11i2ec2172e32172d921e2db2272e72282ea2272e122d2df2332df2382e82382eb238a11i2ec2302f022f3100230a11i2fc22c2fa22f2f92392f923f2fb2413100240310123fa11i21d26b21d27621b28021527e21327721326e21a268225268227268a11i22828222f282233282a11i22c27d22c28322c28b23028c23428ba11i23225e23625f23526823226c22f26c23626ca11i24c27c25527ba11i24a284252285255286a11i26c27826928426b28b27d28628127d28127727e28528228d28d28c294280295275a11i29228e29229229829429b28f29928b29628aa11i2ab2802bb280a11i2b727b2b42822b2286a11i2d92752d02802c92862c727c2ca2772d227b2d5280a11i310326f2f726f2eb2742

然后我该怎么去算具体的VaR呢。

求教大侠。