847 karma · joined April 15, 2011
1. The information has to be specific - Yes - you should sell Boeing
2. Would a reasonable investor take this information into account when making a decision to trade - Yes - this seems quite clear
3. The information must be non public - IIRC disclosure to a large group of people - in this case the perhaps 200ish people on the plane knowing it had a problem would probably count as the information being public and thus this test is not met and you are free to trade - I think the bar is around 30 people
I knew all those hours spent in compliance training would come in handy one day!
Steven Boyd at Stanford and his students / colleagues are probably the richest seam of up to date portfolio optimization wisdom. If you are using python you shoult probably be using CVXPY to build your portfolio. He has lots of good papers, e.g. see [2].
Of course you also need an "edge", that information about the future, and that's the jealously guarded part...
[1] https://books.google.co.uk/books/about/Active_Portfolio_Mana...
How real are real numbers?
In this case the pertinent question to ask oneself a priori is: "if, as I believe, tether breaks down what are the chances that people will be defaulting on Defi platforms thus turning my clever trade in a catastrophe where I lose my principal?"
This is what traders call "wrong way risk" - your trade becomes self-defeating. An example.od this from real life is JPY cross currency basis swaps. A cross currency basis swap consists of 2 back to back loans in different currencies. Japanese investors have excess JPY and seek to convert it to USD via this mechanism so they can buy higher yielding assets in USD. Cross currency basis swaps attract a premium, in this case as the flows are predominantly lending JPY, the lenders get a lower interest rate than the prevailing market rate. The problem arises if you are a US or European bank and wish to do this trade with a Japanese bank. If there is a JPY crisis the premium will become even more negative as Japanese entities scramble to get USD in to meet liabilities by lending JPY. As the foreign bank you will have a mark-to-market profit on the JPY you lent but your Japanese counterparty may well be unable to pay due to the unfolding crisis in Japan.
This makes sense from a Bayesian point if view... What are the experts priors? What's more likely? That their nose is off today or someone is trying to decieve them by dying white wine red? I would guess it's the former. There must be a large publication bias is well, "experts can differentiate white from red wine" is hardly going to get much attention.
To make this a fair trial I think you need to blindfold them rather than "trick" them.
By political corruption I mean activities that are obviously detrimental at societal level. That sucks if you are Charles's Tennant and you want to by the freehold but I'm think more of funnelling contracts to your unqualified friends like the PPE scandals. Again I'm not suggesting the royals are perfect just that the alternative is worse.