Impact of arbitrage between leveraged ETF and futures on market liquidity during market crash

Abstract

Leveraged ETFs (L-ETFs) are exchange-traded funds that achieve price movements several times greater than an index by holding index-linked futures such as Nikkei Stock Average Index futures. It is known that when the price of an L-ETF falls, the L-ETF uses the liquidity of futures to limit the decline through arbitrage trading. Conversely, when the price of a futures contract falls, the futures contract uses the liquidity of the L-ETF to limit its decline. However, the impact of arbitrage trading on the liquidity of these markets has been little studied. Therefore, the present study used artificial market simulations to investigate how the liquidity (Volume, SellDepth, BuyDepth, Tightness) of both markets changes when prices plummet in either (i.e., the L-ETF or futures market), depending on the presence or absence of arbitrage trading. As a result, it was found that when erroneous orders occur in the L-ETF market, the existence of arbitrage trading causes liquidity to be supplied from the futures market to the L-ETF market in terms of SellDepth and Tightness. When erroneous orders occur in the futures market, the existence of arbitrage trading causes liquidity to be supplied from the L-ETF market to the futures market in terms of SellDepth and Tightness, and liquidity to be supplied from the futures market to the L-ETF market in terms of Volume. We also analyzed the internal market mechanisms that led to these results.

Figures (6)

• Figure 1: Market liquidity diagram
• Figure 2: Price time series under the following conditions: no erroneous orders or arbitrage transactions, erroneous orders present but no arbitrage transactions, erroneous orders and arbitrage transactions present but no rebalancing transactions, or erroneous orders, arbitrage transactions, and rebalancing transactions present
• Figure 3: Price movements of leveraged ETFs and futures with misorders, arbitrage, and rebalancing ($S_0=50000$). Although both the left and right vertical axes span a $1000$ range, the initial price of the leveraged ETF is $5000$, half that of the futures, at $10000$. Therefore, a $2$-fold change in the leveraged ETF will cause the graphs to overlap.
• Figure 4: Incorrect orders placed, no arbitrage, and the decline in leveraged ETFs when $S_0$ is altered with arbitrage, along with the sell volume resulting from leveraged ETF rebalancing.
• Figure 5: Incorrect orders placed, no arbitrage, and the decline in futures when $S_0$ is altered with arbitrage, along with the sell volume resulting from leveraged ETF rebalancing.