Question: 光大银行的跟踪误差，在2024年04月29日-2025年04月17日期间为多少？（需年化，A股按一年242个交易日）使用不复权价格，写出指标公式，搜集原始数据，计算得出答案，保留四位小数。注意列出原始数据和关键计算过程。
Formula: TE = \sigma(r - r_b) * \sqrt{242}；r_b 为基准日收益率
Data:
date,close,benchmark_close
2024-04-26,3.11,3584.27
2024-04-29,3.13,3623.91
2024-04-30,3.15,3604.39
2024-05-06,3.16,3657.88
2024-05-07,3.17,3659.01
2024-05-08,3.14,3630.22
2024-05-09,3.15,3664.56
2024-05-10,3.17,3666.28
2024-05-13,3.18,3664.69
2024-05-14,3.18,3657.05
2024-05-15,3.16,3626.06
2024-05-16,3.18,3640.36
2024-05-17,3.22,3677.97
2024-05-20,3.25,3690.96
2024-05-21,3.26,3676.16
2024-05-22,3.29,3684.45
2024-05-23,3.26,3641.79
2024-05-24,3.24,3601.48
2024-05-27,3.28,3635.71
2024-05-28,3.26,3609.17
2024-05-29,3.23,3613.52
2024-05-30,3.22,3594.31
2024-05-31,3.24,3579.92
2024-06-03,3.21,3588.75
2024-06-04,3.23,3615.67
2024-06-05,3.21,3594.79
2024-06-06,3.18,3592.25
2024-06-07,3.21,3574.11
2024-06-11,3.15,3542.88
2024-06-12,3.14,3544.12
2024-06-13,3.11,3526.13
2024-06-14,3.14,3541.53
2024-06-17,3.11,3536.2
2024-06-18,3.11,3545.59
2024-06-19,3.12,3528.75
2024-06-20,3.1,3503.28
2024-06-21,3.09,3495.62
2024-06-24,3.1,3476.81
2024-06-25,3.12,3457.9
2024-06-26,3.13,3480.26
2024-06-27,3.17,3454.12
2024-06-28,3.17,3461.66
2024-07-01,3.19,3478.18
2024-07-02,3.26,3471.79
2024-07-03,3.27,3463.41
2024-07-04,3.28,3445.81
2024-07-05,3.22,3431.06
2024-07-08,3.24,3401.76
2024-07-09,3.27,3439.81
2024-07-10,3.28,3428.97
2024-07-11,3.25,3468.17
2024-07-12,3.3,3472.4
2024-07-15,3.32,3476.25
2024-07-16,3.34,3498.28
2024-07-17,3.37,3501.58
2024-07-18,3.37,3520.93
2024-07-19,3.37,3539.02
2024-07-22,3.32,3514.92
2024-07-23,3.33,3439.88
2024-07-24,3.18,3418.17
2024-07-25,3.15,3399.27
2024-07-26,3.09,3409.29
2024-07-29,3.17,3390.74
2024-07-30,3.17,3369.38
2024-07-31,3.16,3442.08
2024-08-01,3.18,3419.27
2024-08-02,3.16,3384.39
2024-08-05,3.14,3343.32
2024-08-06,3.11,3342.98
2024-08-07,3.14,3341.49
2024-08-08,3.14,3342.94
2024-08-09,3.13,3331.63
2024-08-12,3.1,3325.86
2024-08-13,3.12,3334.39
2024-08-14,3.12,3309.24
2024-08-15,3.18,3341.95
2024-08-16,3.22,3345.63
2024-08-19,3.26,3356.97
2024-08-20,3.25,3332.7
2024-08-21,3.23,3321.64
2024-08-22,3.25,3313.14
2024-08-23,3.26,3327.19
2024-08-26,3.25,3324.22
2024-08-27,3.26,3305.33
2024-08-28,3.22,3286.5
2024-08-29,3.1,3277.68
2024-08-30,3.06,3321.43
2024-09-02,3.07,3265.01
2024-09-03,3.03,3273.43
2024-09-04,3.06,3252.16
2024-09-05,3.07,3257.76
2024-09-06,3.08,3231.35
2024-09-09,3.05,3192.95
2024-09-10,3.08,3195.76
2024-09-11,3.01,3186.13
2024-09-12,3.04,3172.47
2024-09-13,3.04,3159.25
2024-09-18,3.05,3171.01
2024-09-19,3.07,3196.04
2024-09-20,3.09,3201.05
2024-09-23,3.14,3212.76
2024-09-24,3.28,3351.91
2024-09-25,3.33,3401.53
2024-09-26,3.51,3545.32
2024-09-27,3.46,3703.68
2024-09-30,3.6,4017.85
2024-10-08,3.65,4256.1
2024-10-09,3.41,3955.98
2024-10-10,3.55,3997.79
2024-10-11,3.49,3887.17
2024-10-14,3.58,3961.34
2024-10-15,3.48,3855.99
2024-10-16,3.54,3831.59
2024-10-17,3.51,3788.22
2024-10-18,3.51,3925.23
2024-10-21,3.46,3935.2
2024-10-22,3.46,3957.78
2024-10-23,3.48,3973.21
2024-10-24,3.46,3928.83
2024-10-25,3.42,3956.42
2024-10-28,3.42,3964.16
2024-10-29,3.41,3924.65
2024-10-30,3.36,3889.45
2024-10-31,3.45,3891.04
2024-11-01,3.45,3890.02
2024-11-04,3.47,3944.76
2024-11-05,3.53,4044.57
2024-11-06,3.48,4024.28
2024-11-07,3.54,4145.7
2024-11-08,3.49,4104.05
2024-11-11,3.49,4131.13
2024-11-12,3.45,4085.74
2024-11-13,3.47,4110.89
2024-11-14,3.46,4039.62
2024-11-15,3.45,3968.83
2024-11-18,3.6,3950.38
2024-11-19,3.61,3976.89
2024-11-20,3.6,3985.77
2024-11-21,3.59,3989.3
2024-11-22,3.52,3865.7
2024-11-25,3.54,3848.09
2024-11-26,3.59,3840.18
2024-11-27,3.62,3907.04
2024-11-28,3.62,3872.55
2024-11-29,3.6,3916.58
2024-12-02,3.6,3947.63
2024-12-03,3.69,3951.89
2024-12-04,3.71,3930.56
2024-12-05,3.68,3921.59
2024-12-06,3.73,3973.14
2024-12-09,3.74,3966.57
2024-12-10,3.75,3995.64
2024-12-11,3.69,3988.83
2024-12-12,3.78,4028.5
2024-12-13,3.72,3933.18
2024-12-16,3.73,3911.84
2024-12-17,3.68,3922.03
2024-12-18,3.77,3941.89
2024-12-19,3.72,3945.46
2024-12-20,3.7,3927.74
2024-12-23,3.76,3933.57
2024-12-24,3.8,3983.69
2024-12-25,3.83,3985.63
2024-12-26,3.81,3987.48
2024-12-27,3.82,3981.03
2024-12-30,3.91,3999.05
2024-12-31,3.87,3934.91
2025-01-02,3.73,3820.4
2025-01-03,3.71,3775.16
2025-01-06,3.72,3768.97
2025-01-07,3.73,3796.11
2025-01-08,3.74,3789.22
2025-01-09,3.68,3779.88
2025-01-10,3.68,3732.48
2025-01-13,3.61,3722.51
2025-01-14,3.67,3820.54
2025-01-15,3.69,3796.03
2025-01-16,3.73,3800.38
2025-01-17,3.71,3812.34
2025-01-20,3.76,3829.68
2025-01-21,3.78,3832.61
2025-01-22,3.65,3797.02
2025-01-23,3.87,3803.74
2025-01-24,3.87,3832.86
2025-01-27,3.87,3817.08
2025-02-05,3.78,3795.08
2025-02-06,3.77,3842.83
2025-02-07,3.75,3892.7
2025-02-10,3.75,3901.06
2025-02-11,3.75,3883.14
2025-02-12,3.76,3919.86
2025-02-13,3.77,3905.14
2025-02-14,3.78,3939.01
2025-02-17,3.78,3947.4
2025-02-18,3.84,3912.78
2025-02-19,3.83,3940.16
2025-02-20,3.85,3928.9
2025-02-21,3.79,3978.44
2025-02-24,3.77,3969.72
2025-02-25,3.74,3925.65
2025-02-26,3.75,3959.94
2025-02-27,3.79,3968.12
2025-02-28,3.76,3890.05
2025-03-03,3.75,3888.47
2025-03-04,3.76,3885.22
2025-03-05,3.85,3902.57
2025-03-06,3.8,3956.24
2025-03-07,3.8,3944.01
2025-03-10,3.74,3928.8
2025-03-11,3.75,3941.42
2025-03-12,3.78,3927.23
2025-03-13,3.8,3911.58
2025-03-14,3.86,4006.56
2025-03-17,3.87,3996.79
2025-03-18,3.86,4007.72
2025-03-19,3.9,4010.17
2025-03-20,3.9,3974.99
2025-03-21,3.84,3914.7
2025-03-24,3.84,3934.85
2025-03-25,3.86,3932.3
2025-03-26,3.81,3919.36
2025-03-27,3.84,3932.41
2025-03-28,3.82,3915.17
2025-03-31,3.78,3887.31
2025-04-01,3.74,3887.68
2025-04-02,3.81,3884.39
2025-04-03,3.82,3861.5
2025-04-07,3.59,3589.44
2025-04-08,3.66,3650.76
2025-04-09,3.65,3686.79
2025-04-10,3.64,3735.12
2025-04-11,3.65,3750.52
2025-04-14,3.7,3759.14
2025-04-15,3.72,3761.23
2025-04-16,3.79,3772.82
2025-04-17,3.82,3772.22

Indicator data:
Answer: 0.2136