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ISSN No:-2456-2165
Abstract:- This study aims to determine and analyze the Microeconomic factors are economic factors related to
effect of inflation, exchange rates, gross domestic product the company's internal conditions, while macroeconomic
(GDP), and interest rates on the composite stock price factors are factors that exist outside the company (Afiyati &
index on the Indonesia Stock Exchange for the 2015-2019 Topowijono, 2018). Microeconomic variables generally discuss
period. This study uses a quantitative approach. The aspects that can be analyzed through financial ratios, including
samples used are inflation data from the Central Statistics liquidity ratios, activity, probability, solvency, and market
Agency, the USD/IDR exchange rate (JISDOR) from Bank value (David Wijaya, 2017). While macroeconomic variables
Indonesia, GDP data based on current prices from the generally discuss interest rates, economic cycles, inflation,
Central Statistics Agency, and interest rates published by government policies related to specific companies, exchange
Bank Indonesia with an observation period of 5 years rates, tax regulations, budget deficits, interest rates on foreign
quarterly. The data used in this research is secondary data. loans, international economic conditions, understanding of the
This research technique uses Multiple Linear Regression economy, money supply, private investment. Balance of trade
analysis on time series data using the eviews 10 and payments, and GDP (Samsul, 2006; Tandelilin, 2010). This
application. The results indicate that inflation, exchange paper discusses macroeconomic factors in inflation, exchange
rates, and interest rates do not affect the Jakarta rates, GDP, and interest rates because the announcement of
Composite Index (JCI), while GDP has a positive and information about these variables always attracts investors'
significant effect on the JCI. attention, both daily and periodically.
Keywords:- Inflation, Exchange Rate, GDP, Interest Rates. Mostly, high inflation is a negative signal for companies
because the price of raw materials has increased. With the
I. INTRODUCTION increase in production costs, the increase in product prices
cannot be avoided. As a result, the level of sales within the
The industrial world is now facing a new phase called the company will decrease, followed by a decrease in company
Industrial Revolution 4.0, marked by rapid changes in the profits and, of course, will be responded negatively by
current digital era (Athiyah, 2008). However, the issue of investors in the capital market (Sukirno, 2015). Figure II shows
capital is still an obstacle for business actors to develop. They that inflation tends to decrease with quite significant
cannot meet the number of orders or consumer demand due to a fluctuations. Therefore, theoretically, an increase in inflation
lack of costs for production. Therefore, it is undeniable that the should cause the JCI to decline. However, from Q1-2016 to
role of the capital market is increasingly needed over time. In Q2-2016, when inflation is likely to rise, stock index
this case, the capital market plays a significant role in offering movements tend to follow the direction of the movement of
solutions to capital problems that business actors often face. In inflation.
its journey, the Indonesian capital market has experienced
various fluctuations in response to economic factors, both Fig. II JCI and Inflation Movement 2015- 2019
macro and micro, as shown in Figure 1.
C. Arbitrage Pricing Theory Based on the explanations, the hypothesis of this research
Arbitrage Pricing Theory (APT) is a theory from Stephen is:
A. Ross developed from the CAPM theory where APT states 1. inflation has a significant effect on the JCI for the 2015-
that the estimated expected return can be influenced by various 2019 period
factors (multifactor) while the CAPM price is only influenced 2. the exchange rate has a significant effect on the JCI for the
by one factor, namely the market portfolio. The APT 2015-2019 period
multifactor model identifies the number of factors and looks for 3. GDP has a significant effect on the JCI for the 2015-2019
the relationship of these factors to security returns, then period
determines these factors with macro indicators. The assumption 4. interest rates have a significant effect on JCI for the 2015-
that underlies APT is "the law of one price," which is different 2019 period
from the assumption of the CAPM concept. APT describes two
or more securities with the same risk, and this means that each The framework can be described as follows:
security cannot be sold at a different price if the same factors
influence the security in the same economy. The multifactor Fig. VI Thinking Framework
model can be written with the following equation:
D. Inflation
The inflation rate is the rate of change in the general price
level and is measured as follows (Samuelson and Nordhaus,
2004):
Price 𝑡ℎ𝑡 − Price 𝑡ℎ𝑡−1
Inflation 𝑡ℎ𝑡 = 𝑥 100%
𝑃𝑟𝑖𝑐𝑒 (th t)