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            <front>

                <journal-meta>
                                    <journal-id></journal-id>
            <journal-title-group>
                                                                                    <journal-title>Muhasebe ve Finansman Dergisi</journal-title>
            </journal-title-group>
                            <issn pub-type="ppub">2146-3042</issn>
                                                                                                        <publisher>
                    <publisher-name>Muhasebe ve Finansman Öğretim Üyeleri Bilim ve Araştırma Derneği</publisher-name>
                </publisher>
                    </journal-meta>
                <article-meta>
                                        <article-id pub-id-type="doi">10.25095/mufad.1837296</article-id>
                                                                <article-categories>
                                            <subj-group  xml:lang="en">
                                                            <subject>Finance</subject>
                                                            <subject>Financial Forecast and Modelling</subject>
                                                            <subject>Financial Markets and Institutions</subject>
                                                    </subj-group>
                                            <subj-group  xml:lang="tr">
                                                            <subject>Finans</subject>
                                                            <subject>Finansal Öngörü ve Modelleme</subject>
                                                            <subject>Finansal Piyasalar ve Kurumlar</subject>
                                                    </subj-group>
                                    </article-categories>
                                                                                                                                                        <title-group>
                                                                                                                        <trans-title-group xml:lang="en">
                                    <trans-title>Revisiting the Causality Between the IPO Index and Domestic and Foreign Investor Portfolios: Evidence from a Time-Varying Granger Framework</trans-title>
                                </trans-title-group>
                                                                                                                                                                                                <article-title>Halka Arz Endeksi ile Yerli ve Yabancı Yatırımcı Portföyleri Arasındaki Nedensellik İlişkisinin Yeniden Değerlendirilmesi: Zamanla Değişen Granger Yaklaşımından Kanıtlar</article-title>
                                                                                                    </title-group>
            
                                                    <contrib-group content-type="authors">
                                                                        <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0000-0001-9732-0614</contrib-id>
                                                                <name>
                                    <surname>Aydoğdu</surname>
                                    <given-names>Aslan</given-names>
                                </name>
                                                                    <aff>SİVAS BİLİM VE TEKNOLOJİ ÜNİVERSİTESİ</aff>
                                                            </contrib>
                                                    <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0000-0002-9345-5148</contrib-id>
                                                                <name>
                                    <surname>Durmaz</surname>
                                    <given-names>Serkan</given-names>
                                </name>
                                                                    <aff>PAMUKKALE ÜNİVERSİTESİ</aff>
                                                            </contrib>
                                                                                </contrib-group>
                        
                                        <pub-date pub-type="pub" iso-8601-date="20260408">
                    <day>04</day>
                    <month>08</month>
                    <year>2026</year>
                </pub-date>
                                        <volume>0</volume>
                                        <issue>110</issue>
                                        <fpage>113</fpage>
                                        <lpage>138</lpage>
                        
                        <history>
                                    <date date-type="received" iso-8601-date="20251206">
                        <day>12</day>
                        <month>06</month>
                        <year>2025</year>
                    </date>
                                                    <date date-type="accepted" iso-8601-date="20260311">
                        <day>03</day>
                        <month>11</month>
                        <year>2026</year>
                    </date>
                            </history>
                                        <permissions>
                    <copyright-statement>Copyright © 2005, Muhasebe ve Finansman Dergisi</copyright-statement>
                    <copyright-year>2005</copyright-year>
                    <copyright-holder>Muhasebe ve Finansman Dergisi</copyright-holder>
                </permissions>
            
                                                                                                <trans-abstract xml:lang="en">
                            <p>This study aims to investigate the causal relationship between the Public Offering Index (XHARZ) and the portfolio values of domestic and foreign investors. For this purpose, a dataset consisting of 152 monthly observations covering the period June 2012-January 2025 was used. The Time-Varying Granger Causality test developed by Shi et al. (2020) was applied to analyze the relationship between XHARZ and investor portfolio values. The findings indicate a bidirectional causal structure between XHARZ and domestic and foreign investor portfolios, which is sensitive to cyclical regimes. This result points to a cyclical process in which new IPOs increase investor demand, while expanding domestic portfolio volume in turn stimulates IPO activity. However, the direction of causality is mostly from XHARZ to domestic and foreign investor portfolio values, demonstrating that increases in IPOs are a determinant of investor demand. These findings highlight the need for a dynamic and flexible regulatory framework for both regulatory institutions and market actors. By examining the relationship between IPO investor behavior and the Turkish capital markets from a dynamic perspective, the study offers significant methodological and empirical contributions to the literature.</p></trans-abstract>
                                                                                                                                    <abstract><p>Bu çalışmanın amacı, Halka Arz Endeksi (XHARZ) ile yerli ve yabancı yatırımcıların portföy değerleri arasındaki nedensellik ilişkisini incelemektir. Bu doğrultuda, Haziran 2012-Ocak 2025 dönemine ait aylık frekansta toplam 152 gözlemden oluşan bir veri seti kullanılmıştır. XHARZ ile yatırımcı portföy değerleri arasındaki dinamik ilişkiyi analiz etmek amacıyla, Shi vd. (2020) tarafından geliştirilen Zamanla Değişen Granger Nedensellik testi uygulanmıştır. Elde edilen bulgular, XHARZ ile yerli ve yabancı yatırımcı portföy değerleri arasında çift yönlü ve dönemsel rejimlere duyarlı bir nedensellik yapısının varlığını ortaya koymaktadır. Bu sonuçlar, yeni halka arzların yatırımcı talebini artırdığını; genişleyen yerli portföy hacminin ise halka arz faaliyetlerini teşvik ettiğini gösteren döngüsel bir etkileşim mekanizmasına işaret etmektedir. Bununla birlikte, nedenselliğin yönünün çoğunlukla XHARZ’dan yerli ve yabancı yatırımcı portföy değerlerine doğru olduğu tespit edilmiştir. Bu durum, halka arz hacminde meydana gelen artışların yatırımcı talebi üzerinde belirleyici bir rol oynadığını göstermektedir. Bulgular, düzenleyici kurumlar ve piyasa aktörleri açısından dinamik ve esnek bir düzenleyici çerçevenin gerekliliğini vurgulamaktadır. Çalışma, Türkiye sermaye piyasalarında halka arz-yatırımcı davranışı ilişkisini zamanla değişen bir perspektiften ele alarak literatüre önemli metodolojik ve ampirik katkılar sunmaktadır.</p></abstract>
                                                            
            
                                                                                        <kwd-group>
                                                    <kwd>Yatırımcı Portföyleri</kwd>
                                                    <kwd>  Halka Arz Endeksi</kwd>
                                                    <kwd>  Zamanla Değişen Nedensellik</kwd>
                                            </kwd-group>
                            
                                                <kwd-group xml:lang="en">
                                                    <kwd>Investor Portfolios</kwd>
                                                    <kwd>  Initial public offerings index</kwd>
                                                    <kwd>  Time-Varying Granger Causality</kwd>
                                            </kwd-group>
                                                                                                                                    <funding-group specific-use="FundRef">
                    <award-group>
                                                    <funding-source>
                                <named-content content-type="funder_name">Çalışma herhangi bir kurum tarafından desteklenmemiştir.</named-content>
                            </funding-source>
                                                                    </award-group>
                </funding-group>
                                </article-meta>
    </front>
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