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The recent market turmoil has brought attention to how deregulation of the financial sector may affect risk. The purpose of our study is to examine the market's perception of risk associated with deregulation. We accomplish this by decomposing security risk around deregulation into systematic and unsystematic risk. We examine deregulation of several industries and find a consistent pattern of risk adjustment to deregulation, whereby the increase in security risk is temporary and largely unsystematic.

We examine the local investors' perceptions on the relative idiosyncratic risks around cross-listing events. We find that increases in relative firm-specific risks around the listing date are temporary and small for Level I American depositary receipts (ADRs) while Level III ADRs have the most variations. For exchange-listed ADRs from emerging markets, there is a significant decrease in the relative firmspecific risk in the year prior to listing, which increases during the cross-listing, while there are only significant increases in relative firm-specific risks for developed market firms. We interpret these as evidences of negative relationship between firm opaqueness and relative firm-specific risks. K E Y W O R D SADR programs, cross-listing, emerging markets, idiosyncratic risks

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