As the largest black swan event in recent years, the COVID-19 has affected the development of the global economy. As the world's largest economy and one of the countries with the most severe epidemic, the United States has suffered a heavy economic blow. To promote economic recovery, the Federal Reserve has adopted a series of loose policies. This includes the most typical quantitative easing policy. Through literature research, this paper mainly analyzes the impact of the portfolio rebalancing channel in quantitative easing on the US economy. Quantitative easing policies can promote economic recovery to a certain extent, and the channel of portfolio rebalancing is also feasible in theory, but there are uncertainties in the factors affecting the economic environment. When solving the problem of high inflation caused by QE and active fiscal policy, it will have a negative impact on the current economy and enterprises. The government also needs to further consider the balance of economic development.

With the rapid development of the Internet, the world has entered the Internet era - new technologies such as Big data, artificial intelligence and cloud computing are rapidly changing people's lifestyle and consumption concepts. At the same time, competition among internet companies is also very fierce, and after rapid growth, internet companies will also face certain business growth bottlenecks. In this context, if a company wants to expand its business scale, in addition to relying on its own endogenous growth, it usually chooses to implement mergers or acquisitions. By integrating the advantageous resources of enterprises in the same industry or upstream and downstream, the goal is to integrate the value chain, increase market share, and achieve diversified development. This article compares and analyzes two merger and acquisition cases in the Chinese internet industry, exploring the key factors behind mergers and acquisitions, and hoping to provide some inspiration for the merger and acquisition of internet enterprises.

Netflix and binge viewing have gained increasing popularity among the new generation of TV and movie viewers since they are more convenient and can provide customized watch-ing services. This paper is focused on the unique business model of Netflix and seeks to find out why it once became popular among Chinese viewers. A crucial reason is that Netflix has made a committed effort to create and promote original content. It keeps a keen eye on viewers’ needs by creating a tailored and remarkable TV viewing experience. However, the negative impacts of binge-watching behaviour cannot be ignored. It is now considered an important reason for loneliness and a low degree of cognitive function. Overall, the paper employs secondary data analysis, which offers a critical review of previously collected data in the new research area.

This article delves into the influence of Fed’s rate hikes on global financial markets. Being the central bank of the United States, the Federal Reserve wields significant impact in global finance and macroeconomics. The policy of increasing interest rates has sparked extensive debate and apprehension as it profoundly affects the worldwide financial landscape. After thorough examination of relevant literature and research findings, we ascertain that monetary policy’s impact on global financial markets can be primarily understood through several key aspects: 1) The impact of interest rate hikes on the stock market is predominantly negative, which may lead to capital outflows, dampened consumer sentiment and higher borrowing costs. 2) Interest rate hikes have an impact on changes in interest rates in the bond market, which may lead to increased debt expenses and inversions. 3) The interest rate hike influences the exchange rate changes in the foreign exchange market, attracting funds into the United States, resulting in other countries facing the risk of capital outflow and currency depreciation. This article explores the global impact of the Federal Reserve’s interest rate hikes on financial markets and provides valuable insights for policymakers and investors. Given the potential negative consequences of rising interest rates on stock and bond markets, investors may find it prudent to adjust their portfolios accordingly. Simultaneously, it is crucial to closely monitor global economic dynamics and monetary policies while maintaining flexibility in responding to market fluctuations. By doing so, informed investment strategies can be crafted based on these observations.