واکنش خطی و غیرخطی بخش‌های بازار سهام به حرکات قیمتی طلا، ارز و نفت
الموضوعات : پژوهش های مالی و رفتاری در حسابداری
1 - دانشیار گروه حسابداری، دانشکده علوم اجتماعی و اقتصادی، دانشگاه الزهرا (س)، تهران، ایران
2 - دانشجوی دکتری حسابداری، دانشکده علوم اجتماعی و اقتصادی، دانشگاه الزهرا (س)، تهران، ایران
الکلمات المفتاحية: قیمت طلا, واکنش‌های خطی و غیرخطی, بازار سهام, قیمت نفت, قیمت ارز,
ملخص المقالة :
هدف این پژوهش بررسی واکنش خطی و غیرخطی بخش‌های بازار سهام به حرکات قیمت طلا، ارز و نفت است. جامعۀ آماری پژوهش شرکت‌های عضو بورس اوراق بهادار تهران است. داده‌های پژوهش طی سال‌های 1389 تا 1399 بررسی شد. داده‌های پژوهش از نوع سری زمانی است و جهت آزمون فرضیۀ پژوهش از روش رگرسیون خطی و غیرخطی استفاده شده است. نتایج نشان داد که در کوتاه‌مدت قیمت سهام در وقفه‌های 1، 3 و 7 اثر مثبت و در وقفه‌های 2، 4، 6 و 8 اثر منفی بر قیمت سهام دورۀ جاری دارد. مطابق با آزمون والد در مجموع قیمت سهام به طور مثبت از وقفه‌های خود تأثیر می‌پذیرد. همچنین در بلندمدت هم شوک مثبت و هم شوک منفی قیمت نفت اثر معنادار بر شاخص سهام دارد، کشش شاخص به قیمت جهانی نفت‌های 1 درصد است. نرخ ارز و طلا برخلاف قیمت نفت، اثری مثبت بر قیمت سهام در ایران دارند. مطابق با نتایج ضرایب برآوردی الگوی غیرخطی نشان می‌دهد قیمت سهام در مجموع به طور مثبت از وقفه‌های خود تأثیر می‌پذیرد.
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