6366 千代田化工建設(株) の時系列データ [1987年度]
日付 | 始値 | 高値 | 安値 | 終値 | 出来高 | 調整後終値 |
---|---|---|---|---|---|---|
1987-12-28 | 560 | 564 | 545 | 548 | 25,000 | 1,096 |
1987-12-26 | 583 | 583 | 565 | 565 | 69,000 | 1,130 |
1987-12-25 | 577 | 580 | 570 | 570 | 41,000 | 1,140 |
1987-12-24 | 575 | 580 | 575 | 575 | 102,000 | 1,150 |
1987-12-23 | 580 | 583 | 580 | 580 | 72,000 | 1,160 |
1987-12-22 | 580 | 583 | 575 | 580 | 65,000 | 1,160 |
1987-12-21 | 583 | 584 | 578 | 583 | 99,000 | 1,166 |
1987-12-18 | 594 | 594 | 583 | 583 | 84,000 | 1,166 |
1987-12-17 | 586 | 594 | 580 | 594 | 83,000 | 1,188 |
1987-12-16 | 577 | 585 | 576 | 576 | 64,000 | 1,152 |
1987-12-15 | 586 | 595 | 575 | 575 | 82,000 | 1,150 |
1987-12-14 | 585 | 590 | 581 | 581 | 28,000 | 1,162 |
1987-12-11 | 589 | 595 | 570 | 585 | 145,000 | 1,170 |
1987-12-10 | 585 | 585 | 570 | 580 | 108,000 | 1,160 |
1987-12-09 | 570 | 580 | 567 | 570 | 67,000 | 1,140 |
1987-12-08 | 579 | 580 | 560 | 560 | 78,000 | 1,120 |
1987-12-07 | 576 | 583 | 576 | 577 | 41,000 | 1,154 |
1987-12-05 | 580 | 580 | 570 | 576 | 52,000 | 1,152 |
1987-12-04 | 584 | 585 | 574 | 585 | 225,000 | 1,170 |
1987-12-03 | 556 | 575 | 555 | 574 | 295,000 | 1,148 |
1987-12-02 | 555 | 559 | 551 | 555 | 66,000 | 1,110 |
1987-12-01 | 558 | 558 | 555 | 558 | 59,000 | 1,116 |
1987-11-30 | 560 | 565 | 560 | 565 | 37,000 | 1,130 |
1987-11-28 | 579 | 579 | 565 | 565 | 110,000 | 1,130 |
1987-11-27 | 585 | 585 | 575 | 578 | 42,000 | 1,156 |
1987-11-26 | 570 | 581 | 570 | 571 | 86,000 | 1,142 |
1987-11-25 | 580 | 580 | 566 | 570 | 94,000 | 1,140 |
1987-11-24 | 580 | 580 | 579 | 580 | 26,000 | 1,160 |
1987-11-20 | 560 | 565 | 560 | 565 | 24,000 | 1,130 |
1987-11-19 | 565 | 565 | 559 | 559 | 94,000 | 1,118 |
1987-11-18 | 570 | 570 | 555 | 556 | 83,000 | 1,112 |
1987-11-17 | 575 | 575 | 560 | 560 | 127,000 | 1,120 |
1987-11-16 | 571 | 580 | 571 | 575 | 78,000 | 1,150 |
1987-11-13 | 555 | 565 | 555 | 555 | 347,000 | 1,110 |
1987-11-12 | 560 | 570 | 550 | 555 | 165,000 | 1,110 |
1987-11-11 | 580 | 583 | 515 | 539 | 338,000 | 1,078 |
1987-11-10 | 624 | 624 | 590 | 590 | 112,000 | 1,180 |
1987-11-09 | 609 | 614 | 600 | 605 | 51,000 | 1,210 |
1987-11-07 | 609 | 609 | 606 | 609 | 57,000 | 1,218 |
1987-11-06 | 591 | 617 | 591 | 593 | 1,490,000 | 1,186 |
1987-11-05 | 625 | 625 | 591 | 591 | 182,000 | 1,182 |
1987-11-04 | 620 | 620 | 605 | 605 | 118,000 | 1,210 |
1987-11-02 | 631 | 631 | 615 | 620 | 41,000 | 1,240 |
1987-10-31 | 602 | 623 | 602 | 623 | 82,000 | 1,246 |
1987-10-30 | 611 | 615 | 590 | 600 | 481,000 | 1,200 |
1987-10-29 | 610 | 615 | 600 | 601 | 198,000 | 1,202 |
1987-10-28 | 650 | 650 | 612 | 612 | 192,000 | 1,224 |
1987-10-27 | 631 | 650 | 621 | 650 | 213,000 | 1,300 |
1987-10-26 | 665 | 670 | 615 | 615 | 182,000 | 1,230 |
1987-10-24 | 670 | 680 | 665 | 670 | 138,000 | 1,340 |
1987-10-23 | 660 | 710 | 630 | 698 | 721,000 | 1,396 |
1987-10-22 | 680 | 686 | 669 | 669 | 220,000 | 1,338 |
1987-10-21 | 630 | 675 | 625 | 660 | 444,000 | 1,320 |
1987-10-20 | 619 | 619 | 619 | 619 | 178,000 | 1,238 |
1987-10-19 | 720 | 723 | 700 | 719 | 228,000 | 1,438 |
1987-10-16 | 730 | 745 | 730 | 730 | 274,000 | 1,460 |
1987-10-15 | 726 | 735 | 721 | 730 | 237,000 | 1,460 |
1987-10-14 | 739 | 739 | 727 | 731 | 99,000 | 1,462 |
1987-10-13 | 740 | 744 | 739 | 739 | 92,000 | 1,478 |
1987-10-12 | 740 | 760 | 740 | 745 | 131,000 | 1,490 |
1987-10-09 | 755 | 770 | 750 | 750 | 207,000 | 1,500 |
1987-10-08 | 789 | 790 | 770 | 770 | 423,000 | 1,540 |
1987-10-07 | 770 | 781 | 765 | 779 | 606,000 | 1,558 |
1987-10-06 | 780 | 790 | 771 | 783 | 1,042,000 | 1,566 |
1987-10-05 | 770 | 785 | 765 | 784 | 1,234,000 | 1,568 |
1987-10-03 | 745 | 779 | 740 | 778 | 1,805,000 | 1,556 |
1987-10-02 | 725 | 739 | 725 | 739 | 315,000 | 1,478 |
1987-10-01 | 750 | 750 | 720 | 725 | 773,000 | 1,450 |
1987-09-30 | 745 | 761 | 731 | 749 | 1,036,000 | 1,498 |
1987-09-29 | 690 | 752 | 689 | 745 | 1,678,000 | 1,490 |
1987-09-28 | 686 | 690 | 685 | 686 | 116,000 | 1,372 |
1987-09-26 | 684 | 685 | 680 | 685 | 149,000 | 1,370 |
1987-09-25 | 684 | 684 | 675 | 680 | 127,000 | 1,360 |
1987-09-24 | 678 | 678 | 673 | 674 | 113,000 | 1,348 |
1987-09-22 | 680 | 680 | 671 | 673 | 205,000 | 1,346 |
1987-09-21 | 690 | 690 | 675 | 675 | 199,000 | 1,350 |
1987-09-18 | 690 | 690 | 680 | 681 | 129,000 | 1,362 |
1987-09-17 | 680 | 680 | 675 | 680 | 78,000 | 1,360 |
1987-09-16 | 671 | 680 | 670 | 676 | 77,000 | 1,352 |
1987-09-14 | 683 | 683 | 673 | 673 | 73,000 | 1,346 |
1987-09-11 | 670 | 673 | 666 | 673 | 91,000 | 1,346 |
1987-09-10 | 673 | 673 | 666 | 666 | 41,000 | 1,332 |
1987-09-09 | 674 | 674 | 661 | 665 | 49,000 | 1,330 |
1987-09-08 | 668 | 675 | 660 | 675 | 100,000 | 1,350 |
1987-09-07 | 670 | 675 | 670 | 670 | 98,000 | 1,340 |
1987-09-05 | 670 | 678 | 670 | 670 | 88,000 | 1,340 |
1987-09-04 | 671 | 671 | 670 | 670 | 50,000 | 1,340 |
1987-09-03 | 678 | 679 | 670 | 679 | 155,000 | 1,358 |
1987-09-02 | 685 | 686 | 670 | 680 | 242,000 | 1,360 |
1987-09-01 | 679 | 683 | 676 | 681 | 232,000 | 1,362 |
1987-08-31 | 680 | 680 | 676 | 680 | 79,000 | 1,360 |
1987-08-29 | 680 | 680 | 670 | 676 | 37,000 | 1,352 |
1987-08-28 | 661 | 683 | 658 | 680 | 104,000 | 1,360 |
1987-08-27 | 685 | 685 | 668 | 668 | 104,000 | 1,336 |
1987-08-26 | 688 | 689 | 675 | 675 | 176,000 | 1,350 |
1987-08-25 | 680 | 680 | 670 | 678 | 230,000 | 1,356 |
1987-08-24 | 657 | 667 | 655 | 655 | 127,000 | 1,310 |
1987-08-22 | 664 | 670 | 656 | 658 | 108,000 | 1,316 |
1987-08-21 | 680 | 680 | 660 | 661 | 184,000 | 1,322 |
1987-08-20 | 680 | 685 | 674 | 674 | 48,000 | 1,348 |
1987-08-19 | 690 | 690 | 675 | 675 | 88,000 | 1,350 |
1987-08-18 | 694 | 695 | 686 | 690 | 69,000 | 1,380 |
1987-08-17 | 690 | 695 | 681 | 695 | 107,000 | 1,390 |
1987-08-14 | 695 | 700 | 690 | 698 | 287,000 | 1,396 |
1987-08-13 | 685 | 692 | 685 | 692 | 200,000 | 1,384 |
1987-08-12 | 682 | 685 | 675 | 682 | 90,000 | 1,364 |
1987-08-11 | 668 | 680 | 668 | 670 | 153,000 | 1,340 |
1987-08-10 | 686 | 688 | 665 | 665 | 114,000 | 1,330 |
1987-08-07 | 690 | 695 | 681 | 682 | 123,000 | 1,364 |
1987-08-06 | 710 | 715 | 685 | 685 | 382,000 | 1,370 |
1987-08-05 | 695 | 715 | 695 | 705 | 1,018,000 | 1,410 |
1987-08-04 | 685 | 709 | 680 | 691 | 634,000 | 1,382 |
1987-08-03 | 671 | 690 | 671 | 684 | 318,000 | 1,368 |
1987-08-01 | 670 | 680 | 668 | 668 | 259,000 | 1,336 |
1987-07-31 | 669 | 696 | 666 | 690 | 490,000 | 1,380 |
1987-07-30 | 674 | 675 | 663 | 664 | 127,000 | 1,328 |
1987-07-29 | 677 | 677 | 661 | 675 | 171,000 | 1,350 |
1987-07-28 | 650 | 679 | 641 | 670 | 278,000 | 1,340 |
1987-07-27 | 652 | 655 | 645 | 645 | 185,000 | 1,290 |
1987-07-25 | 658 | 658 | 650 | 650 | 56,000 | 1,300 |
1987-07-24 | 669 | 669 | 650 | 652 | 149,000 | 1,304 |
1987-07-23 | 660 | 669 | 640 | 669 | 101,000 | 1,338 |
1987-07-22 | 659 | 659 | 652 | 652 | 162,000 | 1,304 |
1987-07-21 | 661 | 661 | 651 | 659 | 246,000 | 1,318 |
1987-07-20 | 669 | 669 | 651 | 661 | 203,000 | 1,322 |
1987-07-17 | 690 | 695 | 682 | 689 | 252,000 | 1,378 |
1987-07-16 | 685 | 695 | 685 | 689 | 250,000 | 1,378 |
1987-07-15 | 708 | 710 | 690 | 700 | 490,000 | 1,400 |
1987-07-14 | 709 | 725 | 700 | 700 | 2,195,000 | 1,400 |
1987-07-13 | 680 | 708 | 676 | 699 | 2,189,000 | 1,398 |
1987-07-10 | 645 | 685 | 645 | 675 | 1,133,000 | 1,350 |
1987-07-09 | 630 | 640 | 630 | 640 | 457,000 | 1,280 |
1987-07-08 | 630 | 630 | 620 | 630 | 302,000 | 1,260 |
1987-07-07 | 630 | 630 | 620 | 630 | 223,000 | 1,260 |
1987-07-06 | 625 | 635 | 615 | 615 | 285,000 | 1,230 |
1987-07-04 | 645 | 650 | 635 | 635 | 225,000 | 1,270 |
1987-07-03 | 648 | 652 | 642 | 645 | 262,000 | 1,290 |
1987-07-02 | 646 | 646 | 638 | 644 | 85,000 | 1,288 |
1987-07-01 | 650 | 651 | 636 | 636 | 212,000 | 1,272 |
1987-06-30 | 640 | 640 | 632 | 640 | 185,000 | 1,280 |
1987-06-29 | 640 | 654 | 632 | 641 | 320,000 | 1,282 |
1987-06-27 | 670 | 675 | 641 | 641 | 297,000 | 1,282 |
1987-06-26 | 678 | 681 | 671 | 680 | 636,000 | 1,360 |
1987-06-25 | 680 | 680 | 668 | 668 | 441,000 | 1,336 |
1987-06-24 | 650 | 690 | 645 | 680 | 1,461,000 | 1,360 |
1987-06-23 | 643 | 650 | 630 | 640 | 257,000 | 1,280 |
1987-06-22 | 660 | 660 | 645 | 653 | 209,000 | 1,306 |
1987-06-19 | 655 | 664 | 636 | 660 | 845,000 | 1,320 |
1987-06-18 | 645 | 654 | 620 | 654 | 771,000 | 1,308 |
1987-06-17 | 625 | 637 | 625 | 635 | 498,000 | 1,270 |
1987-06-16 | 620 | 626 | 615 | 625 | 402,000 | 1,250 |
1987-06-15 | 606 | 620 | 606 | 616 | 332,000 | 1,232 |
1987-06-12 | 619 | 630 | 616 | 616 | 371,000 | 1,232 |
1987-06-11 | 635 | 635 | 615 | 615 | 312,000 | 1,230 |
1987-06-10 | 615 | 638 | 615 | 638 | 338,000 | 1,276 |
1987-06-09 | 614 | 615 | 613 | 615 | 129,000 | 1,230 |
1987-06-08 | 614 | 615 | 606 | 615 | 182,000 | 1,230 |
1987-06-06 | 614 | 615 | 610 | 614 | 204,000 | 1,228 |
1987-06-05 | 615 | 620 | 610 | 611 | 266,000 | 1,222 |
1987-06-04 | 615 | 620 | 615 | 615 | 292,000 | 1,230 |
1987-06-03 | 624 | 625 | 615 | 616 | 311,000 | 1,232 |
1987-06-02 | 630 | 631 | 621 | 622 | 131,000 | 1,244 |
1987-06-01 | 640 | 645 | 628 | 630 | 323,000 | 1,260 |
1987-05-30 | 615 | 620 | 612 | 620 | 158,000 | 1,240 |
1987-05-29 | 615 | 625 | 611 | 615 | 230,000 | 1,230 |
1987-05-28 | 620 | 625 | 610 | 615 | 269,000 | 1,230 |
1987-05-27 | 620 | 620 | 616 | 620 | 175,000 | 1,240 |
1987-05-26 | 634 | 640 | 621 | 621 | 126,000 | 1,242 |
1987-05-25 | 634 | 660 | 634 | 636 | 115,000 | 1,272 |
1987-05-23 | 655 | 655 | 630 | 631 | 103,000 | 1,262 |
1987-05-22 | 660 | 660 | 624 | 628 | 196,000 | 1,256 |
1987-05-21 | 655 | 660 | 643 | 650 | 265,000 | 1,300 |
1987-05-20 | 635 | 650 | 625 | 648 | 205,000 | 1,296 |
1987-05-19 | 612 | 617 | 612 | 615 | 80,000 | 1,230 |
1987-05-18 | 643 | 643 | 630 | 631 | 97,000 | 1,262 |
1987-05-15 | 625 | 639 | 625 | 633 | 139,000 | 1,266 |
1987-05-14 | 615 | 620 | 615 | 615 | 160,000 | 1,230 |
1987-05-13 | 615 | 620 | 612 | 620 | 242,000 | 1,240 |
1987-05-12 | 650 | 650 | 611 | 625 | 104,000 | 1,250 |
1987-05-11 | 665 | 665 | 644 | 644 | 181,000 | 1,288 |
1987-05-08 | 679 | 690 | 650 | 660 | 264,000 | 1,320 |
1987-05-07 | 690 | 709 | 671 | 671 | 1,447,000 | 1,342 |
1987-05-06 | 658 | 700 | 641 | 670 | 1,404,000 | 1,340 |
1987-05-02 | 645 | 650 | 637 | 650 | 229,000 | 1,300 |
1987-05-01 | 647 | 650 | 635 | 635 | 528,000 | 1,270 |
1987-04-30 | 642 | 655 | 625 | 637 | 452,000 | 1,274 |
1987-04-28 | 650 | 650 | 609 | 612 | 194,000 | 1,224 |
1987-04-27 | 620 | 645 | 605 | 645 | 464,000 | 1,290 |
1987-04-25 | 609 | 609 | 596 | 609 | 91,000 | 1,218 |
1987-04-24 | 620 | 620 | 599 | 599 | 108,000 | 1,198 |
1987-04-23 | 625 | 630 | 591 | 591 | 110,000 | 1,182 |
1987-04-22 | 596 | 615 | 590 | 615 | 150,000 | 1,230 |
1987-04-21 | 611 | 613 | 586 | 586 | 165,000 | 1,172 |
1987-04-20 | 621 | 629 | 601 | 601 | 278,000 | 1,202 |
1987-04-17 | 649 | 649 | 624 | 648 | 150,000 | 1,296 |
1987-04-16 | 670 | 670 | 630 | 650 | 418,000 | 1,300 |
1987-04-15 | 650 | 650 | 620 | 640 | 230,000 | 1,280 |
1987-04-14 | 630 | 650 | 612 | 650 | 546,000 | 1,300 |
1987-04-13 | 636 | 636 | 605 | 620 | 345,000 | 1,240 |
1987-04-10 | 660 | 679 | 651 | 670 | 1,160,000 | 1,340 |
1987-04-09 | 653 | 683 | 645 | 680 | 2,211,000 | 1,360 |
1987-04-08 | 660 | 664 | 630 | 663 | 4,930,000 | 1,326 |
1987-04-07 | 649 | 649 | 649 | 649 | 2,890,000 | 1,298 |
1987-04-06 | 468 | 549 | 468 | 549 | 2,139,000 | 1,098 |
1987-04-04 | 471 | 476 | 469 | 469 | 70,000 | 938 |
1987-04-03 | 471 | 485 | 470 | 470 | 64,000 | 940 |
1987-04-02 | 475 | 480 | 468 | 480 | 125,000 | 960 |
1987-04-01 | 488 | 488 | 472 | 480 | 29,000 | 960 |
1987-03-31 | 465 | 489 | 465 | 489 | 85,000 | 978 |
1987-03-30 | 471 | 490 | 470 | 490 | 64,000 | 980 |
1987-03-28 | 504 | 504 | 480 | 480 | 103,000 | 960 |
1987-03-27 | 500 | 500 | 490 | 500 | 160,000 | 1,000 |
1987-03-26 | 489 | 491 | 480 | 480 | 123,000 | 960 |
1987-03-25 | 500 | 500 | 490 | 495 | 72,000 | 990 |
1987-03-24 | 500 | 503 | 490 | 500 | 130,000 | 1,000 |
1987-03-23 | 515 | 515 | 500 | 504 | 123,000 | 1,008 |
1987-03-20 | 500 | 505 | 498 | 505 | 87,000 | 1,010 |
1987-03-19 | 505 | 505 | 498 | 501 | 98,000 | 1,002 |
1987-03-18 | 500 | 508 | 496 | 498 | 86,000 | 996 |
1987-03-17 | 501 | 510 | 498 | 500 | 57,000 | 1,000 |
1987-03-16 | 500 | 505 | 498 | 498 | 49,000 | 996 |
1987-03-13 | 507 | 510 | 500 | 501 | 180,000 | 1,002 |
1987-03-12 | 510 | 510 | 496 | 508 | 148,000 | 1,016 |
1987-03-11 | 491 | 510 | 491 | 495 | 133,000 | 990 |
1987-03-10 | 490 | 510 | 490 | 507 | 55,000 | 1,014 |
1987-03-09 | 487 | 490 | 487 | 489 | 47,000 | 978 |
1987-03-07 | 485 | 487 | 482 | 487 | 83,000 | 974 |
1987-03-06 | 480 | 485 | 476 | 476 | 137,000 | 952 |
1987-03-05 | 480 | 488 | 480 | 480 | 180,000 | 960 |
1987-03-04 | 489 | 489 | 480 | 480 | 122,000 | 960 |
1987-03-03 | 490 | 494 | 489 | 489 | 222,000 | 978 |
1987-03-02 | 499 | 499 | 491 | 494 | 111,000 | 988 |
1987-02-28 | 495 | 505 | 490 | 490 | 162,000 | 980 |
1987-02-27 | 499 | 500 | 495 | 495 | 157,000 | 990 |
1987-02-26 | 496 | 500 | 496 | 499 | 178,000 | 998 |
1987-02-25 | 500 | 510 | 495 | 501 | 165,000 | 1,002 |
1987-02-24 | 504 | 508 | 498 | 500 | 95,000 | 1,000 |
1987-02-23 | 500 | 510 | 498 | 499 | 135,000 | 998 |
1987-02-20 | 508 | 520 | 506 | 509 | 209,000 | 1,018 |
1987-02-19 | 505 | 512 | 505 | 511 | 160,000 | 1,022 |
1987-02-18 | 500 | 510 | 500 | 500 | 189,000 | 1,000 |
1987-02-17 | 500 | 503 | 495 | 500 | 122,000 | 1,000 |
1987-02-16 | 492 | 500 | 490 | 497 | 65,000 | 994 |
1987-02-13 | 492 | 500 | 492 | 492 | 66,000 | 984 |
1987-02-12 | 501 | 504 | 492 | 492 | 49,000 | 984 |
1987-02-10 | 503 | 503 | 492 | 500 | 78,000 | 1,000 |
1987-02-09 | 510 | 510 | 500 | 500 | 82,000 | 1,000 |
1987-02-07 | 500 | 500 | 490 | 490 | 79,000 | 980 |
1987-02-06 | 505 | 506 | 498 | 505 | 135,000 | 1,010 |
1987-02-05 | 510 | 510 | 495 | 501 | 161,000 | 1,002 |
1987-02-04 | 516 | 520 | 516 | 517 | 34,000 | 1,034 |
1987-02-03 | 521 | 523 | 515 | 520 | 57,000 | 1,040 |
1987-02-02 | 530 | 535 | 520 | 520 | 66,000 | 1,040 |
1987-01-31 | 520 | 530 | 520 | 520 | 43,000 | 1,040 |
1987-01-30 | 535 | 535 | 520 | 530 | 44,000 | 1,060 |
1987-01-29 | 538 | 541 | 525 | 525 | 72,000 | 1,050 |
1987-01-28 | 532 | 539 | 520 | 539 | 81,000 | 1,078 |
1987-01-27 | 532 | 534 | 532 | 532 | 42,000 | 1,064 |
1987-01-26 | 539 | 539 | 520 | 520 | 68,000 | 1,040 |
1987-01-24 | 525 | 537 | 515 | 526 | 172,000 | 1,052 |
1987-01-23 | 516 | 520 | 513 | 515 | 63,000 | 1,030 |
1987-01-22 | 538 | 538 | 518 | 518 | 59,000 | 1,036 |
1987-01-21 | 516 | 530 | 512 | 530 | 80,000 | 1,060 |
1987-01-20 | 510 | 520 | 510 | 515 | 56,000 | 1,030 |
1987-01-19 | 520 | 520 | 511 | 520 | 119,000 | 1,040 |
1987-01-16 | 539 | 540 | 526 | 526 | 24,000 | 1,052 |
1987-01-14 | 527 | 540 | 525 | 540 | 13,000 | 1,080 |
1987-01-13 | 535 | 536 | 525 | 525 | 34,000 | 1,050 |
1987-01-12 | 535 | 536 | 525 | 525 | 63,000 | 1,050 |
1987-01-09 | 542 | 542 | 535 | 537 | 24,000 | 1,074 |
1987-01-08 | 545 | 555 | 531 | 531 | 67,000 | 1,062 |
1987-01-07 | 555 | 558 | 540 | 555 | 74,000 | 1,110 |
1987-01-06 | 570 | 570 | 560 | 560 | 70,000 | 1,120 |
1987-01-05 | 570 | 570 | 561 | 561 | 9,000 | 1,122 |
分割・併合履歴 : [2001-02-20]1株→0.5株 [1984-09-26]1株→1.2株