announcements. They find no result showing the significant effect of
share repurchases on liquidity. In particular, they find a significant
increase in bid-ask spreads prior to the announcement day but no
further change in bid-ask spreads. From these results, they argue that
share repurchases do not have negative impact on liquidity as a result
of increased information asymmetry between informed traders and
uninformed traders because the uninformed investors do not face the
informed traders at all times. Specifically, the repurchasing firms are
Examining
liquidity change surrounding 195 open market share repurchase
announcements over the period 1998-1990, Wiggins (1994) finds only
a small decline in bid-ask spreads and no significant change in depths
following the announcement day. Similarly, Miller and McConnell
(1995) and Kim (2005) find no clear evidence of a significant liquidity
change as a result of open market share repurchases in the U.S. stock
market.