本文旨在檢驗標準普爾500成分股、標準普爾500指數選擇權、波動率指數選擇權彼此間的共變現象。檢驗時間從2006年3月1日至2010年4月30日為止。有充分的證據顯示,在我們的檢驗時間當中,標準普爾500成分股以及標準普爾500指數選擇權之間,若以買賣價差以及交易量相關的指標來衡量,確實有顯著的共變現象,而且此等共變現象在控制了一些流動性的決定因子之後──例如標的物報酬率以及標的物波動率等,其結果仍屬顯著。至於標準普爾500成分股與波動率選擇權之間,若以買賣價差以及交易量相關的指標來衡量,並沒有顯著的共變現象。我們也將選擇權當中買權與賣權分開,再次進行共變性的分析。我們發現標準普爾500指數買權與其標的物之共變現象較標準普爾500指數賣權為明顯;波動率指數選擇權,無論買權或是賣權,其與標準普爾500成分股之共變現象皆不顯著。
This article examines the liquidity commonality for S&P 500 index component stocks, S&P 500 index option, and VIX option markets, using data from 1, March, 2006 to 30, April, 2010, obtained from CRSP database. We find convincing evidence of commonality between S&P 500 index component stocks and S&P 500 index options for various liquidity measures based on the bid-ask spread and volumes impact. The commonality remains strong even after controlling liquidity determinants, such as return of underlying, and volatility. For commonality between S&P 500 index component stocks and VIX options, we find it not significant for both bid-ask spread and volumes impact measures. We also analyze the liquidity commonality with calls and puts separated, and we find S&P 500 index calls exhibit higher commonality with the spot than puts; VIX calls and puts generally report insignificant liquidity commonality.