[Dataloss] Dataloss discussion, debate and chatter

[security curmudgeon]

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 at attrition.org and cc jericho at 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 at covestic.com <DOpacki at 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 at 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 at attrition.org)
: http://attrition.org/dataloss
: Tracking more than 136 million compromised records in 403 incidents over 6 years.
: 
: