BreachExchange mailing list archives
Dataloss discussion, debate and chatter
From: security curmudgeon <jericho () attrition org>
Date: Mon, 9 Oct 2006 18:11:26 -0400 (EDT)
Hello DL subscribers! So far, we have been hopeful that the mail list would spark interesting discussion about the entire realm of dataloss. All discussion to date has been great, adding a lot of value and ideas to the list, perception of incidents, value and more. Moving forward, we still want to see this type of discussion, however, if you feel that the chatted is getting to be higher volume than expected, or not helpful to why you subscribed to the list, please e-mail lyger () attrition org and cc jericho () attrition org to let us know. We will use that feedback for the consideration of a seperate discussion list to cater to both types of people. Thanks! - jericho On Mon, 9 Oct 2006, Allan Friedman wrote: : The idea behind an event study is the critical "all other things : equal" assumption. A security has some fixed value, a piece of news : becomes known to the market, and the price adjusts based on how the : news is percieved. At least in theory :) : : : One upshot is that the "event window" or the period of time examined : for an impact of the new information shouldn't span too much time, : since many other things also affect a security's value. : : Happy to take a methodological discussion offline. In my experience, : they are a fairly commonly used metric, but do not pass muster among : the more serious of econometricians. : : allan : : On 10/9/06, DOpacki () covestic com <DOpacki () covestic com> wrote: : > : > : > : > Indeed, but aren't we talking about means of assessing the performance of : > securities, not necessarily companies? Is it fair to conflate the two? After : > all, the link you sent indicates that "the way that markets react to news : > surprises is perhaps the most visible flaw in the efficient market : > hypothesis". What are data breach disclosures, if not news surprises? : > : > -Dennis : > : > ________________________________ : > From: Chris Walsh : > Sent: Mon 10/9/2006 11:50 AM : > To: Dennis Opacki : > Cc: Allan Friedman; dataloss () attrition org : > Subject: Re: [Dataloss] Data leaks hit share prices hard : > : > : > : > : > : > The underlying theory is generated via the so-called efficient markets : > hypothesis, which holds that stock prices reflect all information available : > to the market about firms' expected future returns. : > : > http://en.wikipedia.org/wiki/Efficient_market_hypothesis : > : > This is a contentious issue :^) : > : > : > : _______________________________________________ : Dataloss Mailing List (dataloss () attrition org) : http://attrition.org/dataloss : Tracking more than 136 million compromised records in 403 incidents over 6 years. : : _______________________________________________ Dataloss Mailing List (dataloss () attrition org) http://attrition.org/dataloss Tracking more than 136 million compromised records in 403 incidents over 6 years.
Current thread:
- Data leaks hit share prices hard Dissent (Oct 09)
- Re: Data leaks hit share prices hard Adam Shostack (Oct 09)
- Re: Data leaks hit share prices hard B.K. DeLong (Oct 09)
- Re: Data leaks hit share prices hard Allan Friedman (Oct 09)
- Re: Data leaks hit share prices hard Chris Walsh (Oct 09)
- Re: Data leaks hit share prices hard Dennis Opacki (Oct 09)
- Re: Data leaks hit share prices hard Chris Walsh (Oct 09)
- Re: Data leaks hit share prices hard Dennis Opacki (Oct 09)
- Re: Data leaks hit share prices hard Allan Friedman (Oct 09)
- Dataloss discussion, debate and chatter security curmudgeon (Oct 09)
- Re: Data leaks hit share prices hard Adam Shostack (Oct 09)
- Re: Data leaks hit share prices hard B.K. DeLong (Oct 09)
- Re: Data leaks hit share prices hard Adam Shostack (Oct 09)
- Re: Data leaks hit share prices hard Alessandro Acquisti (Oct 10)
- Re: Data leaks hit share prices hard ziplock (Oct 10)