Laser Focus World is an industry bedrock—first published in 1965 and still going strong. We publish original articles about cutting-edge advances in lasers, optics, photonics, sensors, and quantum technologies, as well as test and measurement, and the shift currently underway to usher in the photonic integrated circuits, optical interconnects, and copackaged electronics and photonics to deliver the speed and efficiency essential for data centers of the future.

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Editorial Advisory Board

  • Professor Andrea M. Armani, University of Southern California
  • Ruti Ben-Shlomi, Ph.D., LightSolver
  • James Butler, Ph.D., Hamamatsu
  • Natalie Fardian-Melamed, Ph.D., Columbia University
  • Justin Sigley, Ph.D., AmeriCOM
  • Professor Birgit Stiller, Max Planck Institute for the Science of Light, and Leibniz University of Hannover
  • Professor Stephen Sweeney, University of Glasgow
  • Mohan Wang, Ph.D., University of Oxford
  • Professor Xuchen Wang, Harbin Engineering University
  • Professor Stefan Witte, Delft University of Technology

Ambac Financial Group, Inc. - Common Stock (NY:AMBC)

9.540 +0.220 (+2.36%)
Official Closing Price Updated: 7:00 PM EDT, Sep 26, 2025 Add to My Watchlist

Historical Prices

Date Open High Low Close Volume Change (%)
Sep 26, 2025 9.360 9.550 9.335 9.540 550,250 +0.22(+2.36%)
Sep 25, 2025 9.310 9.400 9.130 9.320 416,765 +0.03(+0.32%)
Sep 24, 2025 9.250 9.380 9.210 9.290 310,002 +0.05(+0.54%)
Sep 23, 2025 9.180 9.330 9.100 9.240 524,048 +0.09(+0.98%)
Sep 22, 2025 9.030 9.280 9.000 9.150 493,756 +0.03(+0.33%)
Sep 19, 2025 9.150 9.150 9.020 9.120 1,034,148 +0.00(+0.00%)
Sep 18, 2025 9.030 9.210 9.010 9.120 464,909 +0.18(+2.01%)
Sep 17, 2025 8.820 9.120 8.820 8.940 403,980 +0.17(+1.94%)
Sep 16, 2025 8.690 8.805 8.400 8.770 534,186 +0.00(+0.00%)
Sep 15, 2025 8.910 9.030 8.735 8.770 314,270 -0.14(-1.57%)
Sep 12, 2025 8.900 8.980 8.815 8.910 259,703 -0.01(-0.11%)
Sep 11, 2025 8.870 8.990 8.690 8.920 420,382 -0.02(-0.22%)
Sep 10, 2025 9.040 9.140 8.841 8.940 440,843 -0.19(-2.08%)
Sep 09, 2025 9.220 9.280 9.080 9.130 477,781 -0.05(-0.54%)
Sep 08, 2025 9.150 9.215 8.925 9.180 438,390 +0.08(+0.88%)
Sep 05, 2025 9.150 9.260 9.010 9.100 465,056 -0.09(-0.98%)
Sep 04, 2025 9.170 9.240 9.050 9.190 480,528 +0.07(+0.77%)
Sep 03, 2025 8.840 9.350 8.760 9.120 861,438 +0.19(+2.13%)
Sep 02, 2025 8.960 9.120 8.780 8.930 581,534 -0.10(-1.11%)
Aug 29, 2025 9.070 9.100 8.900 9.030 644,571 +0.02(+0.22%)
Aug 28, 2025 8.920 9.030 8.785 9.010 753,340 +0.16(+1.81%)
Aug 27, 2025 8.660 9.090 8.660 8.850 705,019 +0.14(+1.61%)
Aug 26, 2025 8.650 8.870 8.630 8.710 495,245 +0.00(+0.00%)
Aug 25, 2025 8.650 8.830 8.560 8.710 546,275 +0.06(+0.69%)
Aug 22, 2025 8.640 8.780 8.550 8.650 468,035 +0.16(+1.88%)
Aug 21, 2025 8.430 8.590 8.430 8.490 518,415 +0.00(+0.00%)
Aug 20, 2025 8.240 8.640 8.240 8.490 658,252 +0.27(+3.28%)
Aug 19, 2025 8.280 8.420 8.200 8.220 533,425 -0.08(-0.96%)
Aug 18, 2025 8.070 8.400 8.030 8.300 938,486 +0.26(+3.23%)
Aug 15, 2025 8.020 8.160 7.920 8.040 891,190 +0.02(+0.25%)
Aug 14, 2025 8.150 8.210 7.850 8.020 580,578 -0.20(-2.43%)
Aug 13, 2025 8.040 8.370 7.921 8.220 928,842 +0.17(+2.11%)
Aug 12, 2025 7.780 8.220 7.690 8.050 1,235,513 +0.48(+6.34%)
Aug 11, 2025 6.910 7.600 6.906 7.570 1,250,567 +0.63(+9.08%)
Aug 08, 2025 8.080 8.380 6.860 6.940 2,736,081 -1.35(-16.28%)
Aug 07, 2025 8.580 8.610 8.145 8.290 558,818 -0.25(-2.93%)
Aug 06, 2025 8.640 8.660 8.500 8.540 493,503 +0.03(+0.35%)
Aug 05, 2025 8.430 8.580 8.345 8.510 523,202 +0.24(+2.90%)
Aug 04, 2025 8.250 8.463 8.200 8.270 594,012 -0.07(-0.84%)
Aug 01, 2025 8.340 8.390 8.130 8.340 517,609 -0.06(-0.71%)
Jul 31, 2025 8.260 8.485 8.183 8.400 590,738 -0.03(-0.36%)
Jul 30, 2025 8.580 8.660 8.400 8.430 702,575 -0.12(-1.40%)
Jul 29, 2025 8.720 8.790 8.500 8.550 592,763 -0.08(-0.93%)
Jul 28, 2025 8.720 8.870 8.500 8.630 637,142 -0.19(-2.15%)
Jul 25, 2025 8.660 8.850 8.575 8.820 932,570 +0.20(+2.32%)
Jul 24, 2025 8.720 9.050 8.520 8.620 951,270 -0.17(-1.93%)
Jul 23, 2025 8.820 8.880 8.660 8.790 980,283 +0.08(+0.92%)
Jul 22, 2025 8.830 8.980 8.660 8.710 984,532 -0.05(-0.57%)
Jul 21, 2025 8.770 8.960 8.689 8.760 876,985 +0.01(+0.11%)
Jul 18, 2025 8.730 9.000 8.630 8.750 1,835,625 +0.10(+1.16%)
Jul 17, 2025 7.350 8.770 7.350 8.650 3,257,623 +1.30(+17.69%)
Jul 16, 2025 7.190 7.445 7.090 7.350 939,370 +0.21(+2.94%)
Jul 15, 2025 7.270 7.460 7.005 7.140 1,022,545 +0.05(+0.71%)
Jul 14, 2025 7.080 7.230 7.015 7.090 414,548 -0.01(-0.14%)
Jul 11, 2025 7.040 7.105 6.960 7.100 727,016 +0.00(+0.00%)
Jul 10, 2025 7.240 7.240 6.870 7.100 785,681 -0.16(-2.20%)
Jul 09, 2025 7.620 7.720 7.260 7.260 1,049,873 -0.31(-4.10%)
Jul 08, 2025 7.520 7.890 7.520 7.570 1,841,201 +0.01(+0.13%)
Jul 07, 2025 7.200 8.070 7.190 7.560 2,017,537 +0.37(+5.15%)
Jul 03, 2025 7.130 7.280 7.130 7.190 492,030 +0.10(+1.41%)
Jul 02, 2025 7.100 7.110 6.965 7.090 776,754 +0.00(+0.00%)
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