step_ahead,prediction
1,205.38182520270348
2,205.80488795638087
3,203.6616741627455
4,206.04891565442088
5,205.28084237575533
6,203.72376655936242
7,205.48669198453427
8,205.40210996270181
9,204.0108060896397
10,204.48707393705845
11,203.52748267352584
12,205.09276737272742
13,202.49964235126973
14,203.97651195526126
15,203.71649050414564
16,203.8386569976807
17,204.17011608183387
18,203.84350770115853
19,202.21889516711238
20,202.09199669361115
21,202.1661819279194
22,202.25744638741017
23,204.51314222812655
24,200.9847473025322
25,201.35373997688296
26,203.40847083330155
27,203.8831952750683
28,201.92775119543077
29,202.24379318356515
30,204.1429283976555