Ks. Im et al., Research report: A reexamination of IT investment and the market value of the firm - An event study methodology, INF SYST R, 12(1), 2001, pp. 103-117
Evaluating the effectiveness of Information Technology (IT) investments has
always been an elusive but important goal of IS researchers. This study bu
ilds on a prior study that examined changes in the market value of the firm
as reflected by the stock price in response to IT investment announcements
. Data on stock prices were analyzed for 238 publicly traded companies. In
addition to the stock price analysis, reaction of trading volume to the ann
ouncements was also examined to identify whether IT investment announcement
s affect investors' beliefs about IT value. Potentially confounding factors
such as industry, size, and time lag effects were also analyzed. Size and
time lag effects were found for all IT investment announcements. Reactions
of price and volume were negatively related to firm size and became more po
sitive over time. The positive excess return for smaller firms shows that s
maller firms can leverage the lower price/performance ratio of new IT and r
eap greater rewards from IT investments than larger firms. Also, the result
of time lag effect demonstrates that the stock market has recently begun t
o identify both tangible and intangible benefits of IT investments. For rec
ent IT investment announcements, industry classification and firm size also
affected the reactions of stock price to the announcements. This study pro
vides optimism on the stock market reaction to IT investment announcements
as well as further insight into the study of IT impacts on organizational p
erformance.