Investment is the wealth of one or more assets in the hope of future benefits. Things to consider in investing are profit and risk. So investors need to diversify their investments, which means investors need to form a portfolio through the selection of several assets so that risk can be minimized without reducing expected profits. The COVID-19 pandemic period had a big impact on the economy, especially for investors in making optimal portfolio formation. This study aims to determine the optimal portfolio formation during the COVID-19 pandemic using the Single Index Model. In this study a Single Index Model was be studied systematically and then translated into a programming. The data used are data of consistent shares included in the Jakarta Islamic Index (JII) shares over the past two years. Furthermore, these stocks are chosen which have an average return that is higher than the profits obtained if investors save their money in the bank. The results showed six JII companies included in the candidate for optimal portfolio formation. After the analysis, two shares were produced, namely BRPT with a proportion of 63.8043% and EXCL 36.1957%. The proportion is expected to provide a profit of 1.57% per week and a risk of 6.06% per week. With the proportions obtained, an investment simulation was then carried out during the COVID-19 pandemic. The results of the simulation obtained a gain of 0.0771504% every week. These results are below the risk-free return of assets (SBIS) during the COVID-19-19 pandemic with an average profit of 0.087445% per week. It was concluded that optimal portfolio formation with the Single Index Model did not provide optimal benefits during the COVID-19 pandemic.
This manuscript discusses the strong consistency and the asymptotic distribution of an estimator for a periodic component of the intensity function having a form of periodic function multiplied by power function trend of a non-homogeneous Poisson process by using a uniform kernel function. It is assumed that the period of the periodic component of intensity function is known. An estimator for the periodic component using only a single realization of a Poisson process observed at a certain interval has been constructed. This estimator has been proved to be strongly consistent if the length of the observation interval indefinitely expands. Computer simulation also showed the asymptotic normality of this estimator.
Sosial media sekarang telah memiliki peran penting dalam strategi pemasaran bagi bisnis kecil maupun besar. Kini berbagi informasi kepada pengunjung atau follower bukan satu-satunya keuntungan menggunakan sosial media bagi sebuah bisnis. Jauh lebih yang utama adalah agar produk kita laku dipasar dan banyak diminati pelanggan. Mitra dalam program kegiatan Pengabdian Kepada Masyarakat (PKM) ini adalah salah satu pelaku usaha yang berada di Rangkapan Jaya Depok, Jawa Barat. Pelaku usaha mengeluhkan soal penjualan produk “Mie Depok” yang sulit serta omset yang semakin menurun. Hal ini disebabkan banyaknya kompetitor / pelaku usaha lain yang menjajakan produk yang sama serta minimnya strategi pemasaran. Dalam kegiatan PKM kali ini kami para dosen dan mahasiswa dari Universitas Pamulang mencoba membantu mitra pelaku usaha untuk mengembangkan metode pemasaran melalui social media yang ada seperti, Facebook, Instagram maupun situs belanja online Bukalapak. Diharapkan dengan pelatihan dan penyuluhan penggunakan social media sebagai alat bantu pemasaran dapat meningkatkan penjualan produk “Mie Depok” dan mengurangi permasalahan menurunnya omset penjualan dari pelaku usaha.
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