NATIONAL INSTRUMENTS $28.98
+0.31
|
Date |
Open |
High |
Low |
Close |
Volume |
|
5/20/2013
|
28.72
|
28.95
|
28.62
|
28.67
|
3812
|
|
5/17/2013
|
28.77
|
28.88
|
28.56
|
28.88
|
5758
|
|
5/16/2013
|
28.45
|
28.95
|
28.42
|
28.53
|
2716
|
|
5/15/2013
|
28.51
|
28.67
|
28.35
|
28.55
|
4007
|
|
5/14/2013
|
28.38
|
28.58
|
28.25
|
28.54
|
2521
|
|
5/13/2013
|
28.63
|
28.67
|
28.42
|
28.45
|
4678
|
|
5/10/2013
|
28.17
|
28.78
|
28.15
|
28.75
|
3580
|
|
5/9/2013
|
28.03
|
28.35
|
27.99
|
28.26
|
3206
|
|
5/8/2013
|
27.85
|
28.17
|
27.65
|
28.17
|
2842
|
|
5/7/2013
|
27.51
|
27.88
|
27.35
|
27.85
|
2457
|
|
5/6/2013
|
27.36
|
27.54
|
27.16
|
27.51
|
2922
|
|
5/3/2013
|
27.22
|
27.46
|
27.03
|
27.36
|
3840
|
|
5/2/2013
|
26.78
|
27.05
|
26.57
|
27.02
|
5171
|
|
5/1/2013
|
27.17
|
27.41
|
26.71
|
26.86
|
7918
|
|
4/30/2013
|
27.03
|
27.34
|
26.76
|
27.33
|
7281
|
|
4/29/2013
|
26.99
|
27.18
|
26.36
|
27.10
|
8033
|
|
4/26/2013
|
22.96
|
27.77
|
22.89
|
27.01
|
25265
|
|
4/25/2013
|
30.37
|
30.71
|
30.02
|
30.44
|
3032
|
|
4/24/2013
|
30.24
|
30.44
|
30.02
|
30.31
|
3082
|
|
4/23/2013
|
29.84
|
30.32
|
29.82
|
30.17
|
2821
|
|
4/22/2013
|
29.74
|
29.74
|
29.34
|
29.58
|
2577
|
|
4/19/2013
|
29.95
|
30.13
|
29.51
|
29.68
|
3639
|
|
4/18/2013
|
30.07
|
30.46
|
29.73
|
29.80
|
3505
|
|
4/17/2013
|
30.22
|
30.41
|
29.94
|
30.04
|
2556
|
|
4/16/2013
|
30.36
|
30.45
|
29.98
|
30.42
|
3087
|
|
4/15/2013
|
30.85
|
30.85
|
29.95
|
30.01
|
3244
|
|
4/12/2013
|
30.94
|
31.09
|
30.54
|
30.95
|
1939
|
|
4/11/2013
|
31.11
|
31.12
|
30.79
|
31.09
|
2047
|
|
4/10/2013
|
30.61
|
31.21
|
30.43
|
31.11
|
4227
|
|
4/9/2013
|
30.67
|
30.82
|
30.38
|
30.57
|
5147
|
|
4/8/2013
|
30.75
|
30.75
|
30.30
|
30.50
|
3271
|
|
4/5/2013
|
30.63
|
30.89
|
30.12
|
30.73
|
3239
|
|
4/4/2013
|
31.27
|
31.34
|
31.04
|
31.17
|
2192
|
|
4/3/2013
|
31.80
|
31.98
|
31.03
|
31.08
|
4459
|
|
4/2/2013
|
32.05
|
32.35
|
31.64
|
31.79
|
3286
|
|
4/1/2013
|
32.63
|
32.70
|
31.87
|
31.97
|
3627
|
|
3/28/2013
|
32.19
|
32.83
|
32.02
|
32.75
|
3123
|
|
3/27/2013
|
31.93
|
32.27
|
31.62
|
32.19
|
1891
|
|
3/26/2013
|
31.97
|
32.22
|
31.89
|
32.22
|
1746
|
|
3/25/2013
|
31.98
|
32.08
|
31.60
|
31.81
|
1937
|
|
3/22/2013
|
31.86
|
32.04
|
31.76
|
31.95
|
2186
|
|
3/21/2013
|
31.80
|
31.99
|
31.68
|
31.79
|
1899
|
|
3/20/2013
|
31.61
|
32.06
|
31.52
|
32.02
|
1909
|
|
3/19/2013
|
31.65
|
31.81
|
31.17
|
31.51
|
2759
|
|
3/18/2013
|
31.32
|
31.72
|
31.18
|
31.64
|
3022
|
|
3/15/2013
|
31.20
|
31.64
|
30.85
|
31.61
|
6983
|
|
3/14/2013
|
31.09
|
31.75
|
31.04
|
31.23
|
2109
|
|
3/13/2013
|
30.97
|
31.07
|
30.84
|
31.05
|
1421
|
|
3/12/2013
|
30.95
|
31.11
|
30.78
|
30.96
|
2790
|
|
3/11/2013
|
30.53
|
31.10
|
30.53
|
31.10
|
2245
|
|
3/8/2013
|
31.00
|
31.17
|
30.85
|
31.15
|
1719
|
|
3/7/2013
|
30.82
|
30.99
|
30.46
|
30.90
|
1725
|
|
3/6/2013
|
30.90
|
30.90
|
30.70
|
30.80
|
1594
|
|
3/5/2013
|
30.32
|
30.84
|
30.32
|
30.82
|
2269
|
|
3/4/2013
|
30.07
|
30.28
|
29.93
|
30.23
|
2541
|
|
3/1/2013
|
29.85
|
30.21
|
29.49
|
30.11
|
4784
|
|
2/28/2013
|
30.10
|
30.39
|
30.08
|
30.08
|
3388
|
|
2/27/2013
|
29.69
|
30.33
|
29.69
|
30.20
|
2385
|
|
2/26/2013
|
29.65
|
29.94
|
29.65
|
29.76
|
3198
|
|
2/25/2013
|
29.93
|
30.00
|
29.50
|
29.50
|
5046
|
|
2/22/2013
|
29.61
|
29.91
|
29.53
|
29.91
|
1974
|
|
2/21/2013
|
29.58
|
29.64
|
29.19
|
29.41
|
2873
|
|
2/20/2013
|
30.10
|
30.16
|
29.63
|
29.66
|
2497
|
|
2/19/2013
|
29.96
|
30.17
|
29.92
|
30.12
|
3860
|
|
2/15/2013
|
29.84
|
30.03
|
29.65
|
30.03
|
4010
|
|
2/14/2013
|
29.79
|
29.93
|
29.71
|
29.91
|
1772
|
|
2/13/2013
|
29.86
|
30.00
|
29.70
|
30.00
|
2602
|
|
2/12/2013
|
29.51
|
29.80
|
29.51
|
29.80
|
2381
|
|
2/11/2013
|
29.80
|
29.91
|
29.32
|
29.64
|
2378
|
|
2/8/2013
|
29.53
|
29.94
|
29.40
|
29.89
|
2688
|
|
2/7/2013
|
29.55
|
29.61
|
29.25
|
29.58
|
3000
|
|
2/6/2013
|
29.13
|
29.68
|
28.89
|
29.68
|
4049
|
|
2/5/2013
|
29.09
|
29.45
|
28.98
|
29.35
|
4419
|
|
2/4/2013
|
29.14
|
29.82
|
29.07
|
29.26
|
6667
|
|
2/1/2013
|
29.69
|
30.28
|
28.38
|
30.10
|
9471
|
|
1/31/2013
|
28.05
|
28.45
|
28.05
|
28.40
|
3399
|
|
1/30/2013
|
27.98
|
28.23
|
27.86
|
28.08
|
3939
|
|
1/29/2013
|
27.99
|
28.17
|
27.91
|
28.06
|
2103
|
|
1/28/2013
|
28.10
|
28.23
|
27.72
|
28.09
|
2884
|
|
1/25/2013
|
27.82
|
28.29
|
27.75
|
28.22
|
2320
|
|
1/24/2013
|
27.50
|
27.84
|
27.50
|
27.67
|
1956
|
|
1/23/2013
|
27.58
|
27.85
|
27.49
|
27.60
|
1928
|
|
1/22/2013
|
27.30
|
27.56
|
27.16
|
27.56
|
2359
|
|
1/18/2013
|
27.42
|
27.50
|
27.01
|
27.43
|
1532
|
|
1/17/2013
|
27.24
|
27.50
|
27.04
|
27.42
|
1438
|
|
1/16/2013
|
27.13
|
27.21
|
27.06
|
27.20
|
2054
|
|
1/15/2013
|
26.88
|
27.20
|
26.77
|
27.14
|
1653
|
|
1/14/2013
|
26.87
|
27.04
|
26.76
|
27.00
|
1976
|
|
1/11/2013
|
26.83
|
27.09
|
26.83
|
26.99
|
1762
|
|
1/10/2013
|
27.20
|
27.20
|
26.74
|
26.83
|
2848
|
|
1/9/2013
|
26.87
|
27.08
|
26.86
|
27.05
|
3119
|
|
1/8/2013
|
26.63
|
26.86
|
26.56
|
26.73
|
3493
|
|
1/7/2013
|
26.28
|
26.80
|
26.13
|
26.76
|
3503
|
|
1/4/2013
|
26.35
|
26.54
|
26.15
|
26.48
|
3379
|
|
1/3/2013
|
26.37
|
26.48
|
26.21
|
26.37
|
2884
|
|
1/2/2013
|
26.27
|
26.65
|
25.85
|
26.45
|
5336
|
|
12/31/2012
|
25.22
|
25.83
|
25.19
|
25.81
|
3423
|
|
12/28/2012
|
25.41
|
25.52
|
25.24
|
25.36
|
2340
|
|
12/27/2012
|
25.54
|
25.66
|
25.36
|
25.60
|
3656
|
|
12/26/2012
|
25.52
|
25.64
|
25.35
|
25.50
|
3094
|