{"id":1084,"date":"2010-06-23T22:30:23","date_gmt":"2010-06-23T21:30:23","guid":{"rendered":"http:\/\/soci.hu\/blog\/?p=1084"},"modified":"2010-06-23T22:30:23","modified_gmt":"2010-06-23T21:30:23","slug":"tozsde-analysis-of-the-flash-crash-date-of-event-may-6-2010","status":"publish","type":"post","link":"https:\/\/soci.hu\/blog\/index.php\/2010\/06\/23\/tozsde-analysis-of-the-flash-crash-date-of-event-may-6-2010\/","title":{"rendered":"T\u0151zsde: Analysis of the &#8220;Flash Crash&#8221;  Date of Event: May 6, 2010"},"content":{"rendered":"<p><a href=\"http:\/\/www.nanex.net\/20100506\/FlashCrashAnalysis_Intro.html\">Informatikai elemz\u00e9s<\/a>, mit\u0151l volt a t\u0151zsdebeszakad\u00e1s.<br \/>\nEg\u00e9szen megd\u00f6bbent\u0151. Kb. arr\u00f3l sz\u00f3l, hogy a New Yorki t\u0151zsd\u00e9r\u0151l elkezdtek k\u00e9sni az adatok, amit\u0151l megborult a t\u0151zsd\u00e9k k\u00f6z\u00f6tti, legjobb \u00e1rat szab\u00e1lyoz\u00f3 replik\u00e1ci\u00f3s rendszer. A k\u00e9s\u00e9s oka az lehetett, hogy t\u00falterhel\u0151d\u00f6tt a t\u0151zsde adateloszt\u00f3ja, \u00e9s az aj\u00e1nlatok id\u0151b\u00e9lyeg\u00e9t (el\u00e9g furcsa m\u00f3don) nem az aj\u00e1nlat bead\u00e1sakor \u00edrj\u00e1k be, hanem amikor kij\u00f6n a cs\u0151b\u0151l. Emiatt k\u00edv\u00fclr\u0151l nem l\u00e1tszik a cs\u00fasz\u00e1s. De ami \u00e9rdekesebb, mit\u0151l dugult be a t\u0151zsde?<br \/>\nMa m\u00e1r nagyon sok nagyfrekvenci\u00e1s algoritmus fut, amelyek m\u00e1r ms alatti id\u0151k alatt d\u00f6ntenek \u00e9s reag\u00e1lnak (ezek a szerverek a t\u0151zsde LAN-j\u00e1n vannak, nagyon k\u00f6zel a f\u0151 sz\u00e1m\u00edt\u00f3g\u00e9pek h\u00e1l\u00f3zat\u00e1hoz, \u00edgy a h\u00e1l\u00f3zati k\u00e9seltet\u00e9s csak mikrosec nagys\u00e1grend\u0171).<br \/>\nEzek egym\u00e1ssal persze versenyeznek. \u00c9s itt j\u00f6n a buli. Valamelyik algoritmus elkezd mpeknk\u00e9nt t\u00f6bb ezer aj\u00e1nlatot bek\u00fcldeni. \u0150 persze nem elemzi ezeket, hisz \u0151 k\u00fcldte be. De a t\u00f6bbiek ezt elemzik, \u00e9s am\u00edg ezzel t\u00f6ltik az id\u0151t, \u0151 r\u00e1\u00e9r kisajtolni a profitot. Spamelik a t\u0151zsd\u00e9t. Ez persze destabiliz\u00e1lja az eg\u00e9sz rendszert. A skynet \u00e9bredezik.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Informatikai elemz\u00e9s, mit\u0151l volt a t\u0151zsdebeszakad\u00e1s. Eg\u00e9szen megd\u00f6bbent\u0151. Kb. arr\u00f3l sz\u00f3l, hogy a New Yorki t\u0151zsd\u00e9r\u0151l elkezdtek k\u00e9sni az adatok, amit\u0151l megborult&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[69,3],"tags":[],"class_list":["post-1084","post","type-post","status-publish","format-standard","hentry","category-tozsde","category-elet"],"_links":{"self":[{"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1084","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/comments?post=1084"}],"version-history":[{"count":2,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1084\/revisions"}],"predecessor-version":[{"id":1086,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1084\/revisions\/1086"}],"wp:attachment":[{"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/media?parent=1084"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/categories?post=1084"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/tags?post=1084"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}