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All Journal Jurnal Ilmu Sosial dan Humaniora International Journal of Social Science and Business Journal of Applied Management and Business (JAMB) Akuntansi'45 Jurnal Pengabdian Masyarakat STIE Surakarta (DIMASETA)
Stefan, Yonatan Alvin
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Humanities Computer Science & IT Economics, Econometrics & Finance Environmental Science Social Sciences Other

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The Influence of Exchange Rate, World Oil Price, and BI Rate on Airline Companie’s Return in Indonesian Stock Market Stefan, Yonatan Alvin; Robiyanto, Robiyanto
International Journal of Social Science and Business Vol 3, No 3 (2019)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (506.549 KB) | DOI: 10.23887/ijssb.v3i3.21059

Abstract

In an effort to support the economic growth of Indonesia, an infrastructure development is carried out to achieve the national development. It brings positive influences on transportation companies in Indonesia. Many companies list their shares to Indonesia Stock Exchange, including PT. Garuda Indonesia (Persero) Tbk (IDX code: GIAA) and PT. AirAsia Indonesia Tbk (IDX code: CMPP), aiming to have additional capital sources. The two companies can be such a reference for investors to make investments, but they still need to consider the macro factors attached. This study examines the influende of exchange rate, world oil price, and Bank Indonesia (BI) rates on the GIAA and CMPP stock returns. The analysis technique used was Generalize Autoregressive Conditional Heteroscedasticity (GARCH) and daily data starting from their IPO to February 28th, 2019. The results showed that the exchange rate negatively affected the GIAA and CMPP stock returns, while the world oil prices only negatively affected the CMPP stock return, and the BI rates only negatively affected the GIAA stock return. In general, the investors are suggested not to buy the GIAA and CMPP shares when the IDR exchange rate weakens against the US dollar exchange rate.
KORELASI DINAMIS PASAR SAHAM ASEAN DENGAN NILAI TUKAR DOLLAR AMERIKA SERIKAT (USD) DI ERA DONALD TRUMP Stefan, Yonatan Alvin; Robiyanto, Robiyanto
Jurnal Ilmu Sosial dan Humaniora Vol 8, No 2 (2019)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jish-undiksha.v8i2.21380

Abstract

Optimalisasi Instagram sebagai Strategi Pemasaran Digital untuk UMKM Kepepes Febisatria, Andhi; Putri, Ainin Syukuria; Stefan, Yonatan Alvin
Jurnal Pengabdian Masyarakat STIE Surakarta Vol 4 No 1 (2025): Juni 2025
Publisher : Sekolah Tinggi Ilmu Ekonomi Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56456/dimaseta.v4i1.164

Abstract

Perkembangan teknologi digital telah mendorong pelaku Usaha Mikro, Kecil, dan Menengah (UMKM) untuk mengadopsi strategi pemasaran yang lebih modern dan adaptif. Salah satu pendekatan yang relevan adalah pemanfaatan media sosial sebagai sarana pemasaran digital, khususnya platform Instagram yang memiliki daya tarik visual dan jangkauan luas. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan kapasitas pelaku UMKM “Kepepes”, sebuah usaha kuliner berbasis pepes ikan, dalam mengelola akun Instagram sebagai alat pemasaran produk. Metode pelaksanaan kegiatan berupa pelatihan langsung kepada pemilik UMKM. Materi pelatihan meliputi perencanaan konten, teknik copywriting, manajemen unggahan, dan analisis insight Instagram. Hasil pelatihan menunjukkan adanya peningkatan pemahaman dan keterampilan peserta dalam membuat konten yang menarik, serta menyusun strategi komunikasi pemasaran digital yang lebih terarah. Peserta juga mampu menyusun kalender konten dan memahami waktu optimal untuk melakukan promosi di media sosial. Dengan pelatihan ini, UMKM diharapkan dapat meningkatkan jangkauan pasar dan daya saingnya melalui optimalisasi media sosial. Kegiatan ini membuktikan bahwa edukasi digital kepada pelaku UMKM sangat penting untuk mendorong pertumbuhan usaha yang berkelanjutan di era transformasi digital.
Pengaruh Efisiensi Biaya Proyek terhadap Profitabilitas pada Perusahaan Konstruksi (Studi Kasus Periode 2021-2023) Stefan, Yonatan Alvin
AKUNTANSI 45 Vol. 6 No. 1 (2025): Jurnal Ilmiah Akuntansi
Publisher : Fakultas Ekonomi Program Studi Akuntansi Universitas 45 Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30640/akuntansi45.v6i1.4092

Abstract

The construction industry in Indonesia plays an important role in driving national economic growth, but also faces major challenges in managing efficient project costs to maintain profitability levels. This study aims to examine the effect of project cost efficiency on the profitability of construction companies, using Return on Assets (ROA) as an indicator of financial performance. This study uses a quantitative approach with secondary data taken from the annual financial reports of construction companies listed on the Indonesia Stock Exchange (IDX) for the period 2021–2023. The analysis technique used is spearman correlation. The results of the study show that the Cost of Goods Sold to Revenue (COGS to Revenue) ratio has a significant negative effect on ROA, and Asset Turnover (ATO) also has a significant negative effect on ROA. Meanwhile, the Operating Expense Ratio variable shows a negative effect on ROA. These findings confirm that project cost efficiency and optimization of asset use play an important role in increasing the profitability of construction companies. The practical implication of this study is the need for a more effective cost and asset management strategy to maintain financial performance amidst the challenges of the construction industry.
Analysing Debt Ratio, Equity Ratio, Asset Turnover Impact on Return on Assets in Transport and Logistics Stefan, Yonatan Alvin; Damayanti, Novia Putri
Journal of Applied Management and Business Vol. 6 No. 2 (2025): Vol. 6, No. 2, December 2025
Publisher : Universitas Dinamika

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study analyzes the financial performance of transportation and logistics companies listed on the Indonesia Stock Exchange (IDX) during the 2023–2024 period, with a focus on the influence of Debt Ratio, Equity Ratio, then Asset Turnover against Return on Assets. Secondary data were obtained from the company's annual financial reports, processed using robust regression methods, considering the violation of the normality assumption in the data. The results showed that DR and ER had a significant negative effect on ROA, indicating that high proportions of debt and equity can reduce company profitability. This finding is in line with Trade Off Theory, which highlights the financial risks resulting from leverage or excess equity. Meanwhile, ATO was not proven to have a significant effect on ROA, indicating that asset turnover efficiency was not yet able to drive profitability during this study period. The robust regression model was able to explain 32.8% of the variation in ROA, while the remainder was influenced by factors outside the model, such as operational costs, company size, or macroeconomic conditions. This study provides practical implications for management in optimally managing funding structures and improving operational efficiency. For investors, these results provide an important signal in assessing a company's financial risk. Future research is recommended to expand the analysis variables and conduct comparative studies across transportation and logistics sub sectors.
Co-Authors Ainin Syukuria Putri, Ainin Syukuria Damayanti, Novia Putri Febisatria, Andhi Robiyanto Robiyanto Robiyanto, Robiyanto