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Market Microstructure and the Ex‐Date Return
Author(s) -
CONRAD JENNIFER S.,
CONROY ROBERT
Publication year - 1994
Publication title -
the journal of finance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 18.151
H-Index - 299
eISSN - 1540-6261
pISSN - 0022-1082
DOI - 10.1111/j.1540-6261.1994.tb02464.x
Subject(s) - closing (real estate) , economics , econometrics , financial economics , monetary economics , order (exchange) , offset (computer science) , computer science , finance , programming language
This article examines the role of measurement biases, due to order flow effects, in abnormal split ex‐day returns. We conjecture that postsplit orders consist of numerous small buyers and fewer larger sellers. This change in order flow causes closing prices to occur more frequently at the ask price, consistent with Maloney and Mulherin (1992) and Grinblatt and Keim (1991). In addition, this change causes specialists' spreads to increase, perhaps to offset larger average inventories. We examine both NYSE and NASDAQ samples and find that order flow biases can explain approximately 80 percent (48 percent) of the NYSE (NASDAQ) ex‐day return.