Changes in the options contract size and arbitrage opportunities

We examine the impacts of changes to the options multiplier on market efficiency by analyzing their effects on arbitrage proxies based on the performance of options spread strategies. Despite the intentions of the reforms, both decisions to raise and reduce the multiplier significantly increase the frequency and probability of arbitrage opportunities. Whereas the increment in the multiplier also deteriorates market efficiency by increasing the duration and average size of the arbitrage opportunities in a day, the decrement does not affect these proxies. Our results overall provide evidence that reforms to the options multiplier do not enhance market efficiency and suggest that retail investors are not homogeneously noisy.     

Expectations and the housing market: A model of house price dynamics

We examine the characteristics of housing markets under adaptive and heterogeneous expectations. Model agents have finite horizons, and their borrowings are constrained by the collateral value of housing stock. Our model shows that expectation-driven housing price dynamics constantly change the direction of movement. The steady-state process of housing prices follows an endogenous oscillation process, and the magnitude of the cycles can be amplified by external shocks. Our quantitative results imply that (i) short-term positive and long-term negative serial correlations in housing price changes are inherent, (ii) house prices and expected house price movements are positively correlated, and (iii) fluctuations in housing prices are not fully explained by fundamentals.     

E-commerce retail and reverse factoring: A newsvendor approach

This study builds a theoretical model to examine how supply chain finance (SCF) services using fintech can ease e-commerce suppliers' capital constraints. Despite the innovation in the logistics industry during the Fourth Industrial Revolution and the increasing online shopping in the post-COVID era, small e-commerce enterprises may fail to grow owing to their budget constraints. Reverse factoring is believed to ease such suppliers' capital constraints. We analyze the effect of reverse factoring using the capital-constrained newsvendor model, and we consider the impacts of additional funding from SCF services. Our results show that SCF services reduce e-commerce suppliers' initial orders and, thus, alleviate their budget constraints. This finding suggests that the discount factor of reverse factoring should be higher to ease small suppliers' budget constraints and allow the e-commerce industry to grow sustainably.     

How agglomeration affects alliance governance and innovation performance: The role of cluster size

We investigate how the size of the geographic cluster in which a firm is located influences its governance choice between equity and non-equity alliances and subsequent innovation performance. We argue that firms located in larger clusters tend to form non-equity alliances rather than equity alliances because the communication and control benefits of cluster membership, which increase with cluster size, reduce in-cluster firms' need to form equity alliances. We also claim that the effect of this preferential use of non-equity alliances on innovation becomes stronger when firms are located in larger clusters. Our arguments are supported by a panel analysis of alliances formed by US-listed semiconductor firms.     

Sentiment-dependent impact of funding liquidity shocks on futures market liquidity

We examine the effect of funding liquidity changes on futures market liquidity, depending on economic sentiment. Futures market liquidity improves following negative funding liquidity shocks, and economic sentiment is an important determinant explaining this relationship. While individuals' trading is most significantly affected by sentiment, its response to funding liquidity shocks remains independent of sentiment effects. Domestic institutions' reactions depend on the sentiment regime; they trade futures contracts more actively as funding liquidity becomes more abundant (scarcer) when sentiment is more pessimistic (optimistic). Foreigners, following negative funding liquidity shocks, generally increase their futures trading, whereas their trading decreases under the extremely pessimistic sentiment. Domestic banks and pension funds provide liquidity to the futures market even when sentiment is pessimistic.