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Mar 1, 2013 at 23:00 answer added ClassicalPhysicist timeline score: -2
Mar 1, 2013 at 18:23 answer added abo timeline score: 1
Mar 1, 2013 at 16:58 answer added mt_christo timeline score: 0
Jan 19, 2012 at 17:51 answer added Hao Zhang timeline score: 0
Jan 19, 2012 at 14:03 answer added Quant timeline score: 3
Feb 2, 2011 at 13:37 answer added Deane Yang timeline score: 5
Feb 2, 2011 at 9:26 answer added The Bridge timeline score: 0
Feb 1, 2011 at 21:34 comment added Jeff Harvey @Igor: No problem, I probably shouldn't have said anything since my knowledge was second hand. I agree with you in general about the superiority of open research but given the amount of money involved and the hundreds of math and physics Ph.D's employed at places like Renaissance there may be some exceptions to your general observation.
Feb 1, 2011 at 21:20 comment added Igor Rivin @Jeff: You don't need to defer to me, I am just reporting on my experience (there might be someone at Citadel who has figured everything out, and not published, who can say) -- the general observation is that proprietary research is vastly inferior to open research, partly because it is not open, and partly because it has different goals. As for my snapping at you, apologies, but your comment sounded like: I know something, but won't tell you, nyah, nyah.
Feb 1, 2011 at 21:12 comment added Jeff Harvey @Igor Rivin: I just made a comment, not an answer. If my comment were true I can imagine it being useful to some to know there are answers that are not in the open literature. My comment was based on statements to me from people I know who have worked in options trading for 20+ years. However I don't have any direct knowledge that my statement is correct and from your comment it sounds like you do, so I defer to your not inconsiderable knowledge.
Feb 1, 2011 at 20:57 comment added Igor Rivin @Jeff Harvey: How is your answer useful? Aside from being useless, it is also incorrect: OP is asking for a mathematical theory useful for heavy tails, not practical trading suggestions. To the best of my (not inconsiderable) knowledge, there is no better proprietary theory than what is published, though there are plenty of proprietary kludges.
Feb 1, 2011 at 20:30 answer added arsmath timeline score: 4
Feb 1, 2011 at 19:35 comment added Jeff Harvey The best answers are not in the open literature.
Feb 1, 2011 at 18:24 answer added Simon Lyons timeline score: 6
Feb 1, 2011 at 18:17 answer added Igor Rivin timeline score: 3
Feb 1, 2011 at 18:16 comment added Shai Covo books.google.co.il/… -- see the Contents.
Feb 1, 2011 at 18:01 history asked DoubleJay CC BY-SA 2.5