chapter3(1 / 3)
chapter3
05
鍗$憺濞滅殑鑵块棿甯︾潃鎽╂摝鍚庣殑鐑剰鍜屽井寰殑鐤肩棝锛屽ス娣卞懠涓鍙f皵锛岃嚜宸卞叏韬alpha娴撶儓鐨勬皵鎭粰鍖呭洿鐨勩備竴鍚戝己鍔跨殑鍗$憺濞滃嚭鐜颁簡涓鑲″埆鎵劅锛岃濂规棤娉曢備粠銆備汉宸ュ埗閫犵殑鎵嬬虎宸茬粡绮惧瘑鍒版儕浜虹殑绋嬪害锛屾煍瀵嗙殑鎰熻璁╀汉鎰熻涓嶅埌浠讳綍鐨勭矖绯欐劅锛岀鐟炴寜鐫澶氬姛鑳芥瀛愪笂鐨勬寜閽紝浠庤竟涓婂嚭鏉ヤ竴涓皬绠¢亾鈥斺旀槸鎺ユ按鐢ㄧ殑銆?br />
澶х害鏄痑lpha鍒氬垰鍙戞硠杩囩殑鍘熷洜锛屼粬鐜板湪蹇冩儏涓嶉敊锛屽師鏈縺鐑堢媯韬佺殑鎯呯华涔熼愭笎绋冲畾涓嬫潵銆?br />
浣嗕簨瀹炰笂绉戠憺鏄釜鏋佸叾鑳芥帉鎺ц嚜宸辨鏈涚殑浜猴紝灏辩畻鍦ㄦ槗鎰熸湡涓嶆敞灏勬姂鍒跺墏浠栦篃鑳界浉淇¤嚜宸辫兘骞冲畨鍦扮啲杩囧幓銆?br />
鍐板噳鐨勬按纰板埌浜嗗崱鐟炲鐧界殭鐨勮倢鑲わ紝灏界alpha鐨勬ф闈炲父杩呴熷湴鍙堣鎾╄捣锛屼笉杩囩敤灞佽偂鎯虫兂涔熺煡閬撳皬鍒虹尙鏄笉浼氱瓟搴斿啀鏉ヤ竴娆$殑鈥斺斿惁鍒欏皬鍒虹尙涓瀹氫細鐢ㄥ敖鍏ㄥ姏鎶婁粬缁欐墡姝荤殑銆傛瘯绔熷皬鍒虹尙鐨勭洰鐨勫凡缁忚揪鍒颁簡銆傜鐟炲湪鑴戜腑鏈変簺閬楁喚鍦板徆鎭?br />
鈥滃皬鍒虹尙鈥斺旀垜杩樹笉鐭ラ亾浣犲彨浠涔堝悕瀛楀憿锛熲濈鐟炶交鏌斿湴鎻′綇娌句簡鍑夋按鐨勬墜甯曪紝缁欏崱鐟炲鐨勮吙闂存摝鎷備粬鐨勬墜閫愭笎鍦板線涓婄Щ鍔紝鎵嬬虎蹇纰板埌闅愮鐨勫湴鏂圭殑鏃跺欏崱鐟炲闈炲父澶у姏鍦版彙浣忎簡浠栫殑鎵嬭厱锛屽嵆浣垮alpha鏉ヨ杩欒偂鍔涙皵绠椾笉浜嗕粈涔堛?br />
鍗$憺濞滄病濂芥皵鍦扮灙浜嗕粬涓鐪硷紝鎶借繃浠栨墜涓殑鎵嬪笗锛屸滃崱鐟炲銆傗?br />
濂规病鏈夎濮撱?br />
绉戠憺鎸戜簡鎸戠湁銆?br />
鍙槸绉戠憺骞朵笉鍦ㄦ剰锛屽湪澶у鏁版儏鍐典笅锛屼汉鎬绘槸浠ヨ嚜宸卞鏃忎负鍌茬殑锛岀壒鍒槸鍐犱笂鍙よ佸張甯︾潃琛鑵ヨ崳鑰鐨勫鏃忎箣濮撶殑鏃跺欙紝楠勫偛鎰熸补鐒惰岀敓銆?br />
鍗$憺濞滃苟娌℃湁浠涔堣鍒绘剰闅愯棌鍚嶅瓧鐨勫繀瑕併?br />
姣曠珶濂规槸涓涓悕涓嶈缁忎紶鐨勫皬beta銆傝皝浼氬湪鎰忎竴涓猙eta鍛紵
灏界鍦ㄦ极闀跨殑鍘嗗彶褰撲腑锛岀殑纭湁寰堝beta鎴栨槸浣滀负鍏冨竻鎴栨槸浣滀负宸ㄥ瘜鎴栨槸涓浣嶇弽璐电殑璧勬簮鍨嬪ぉ鎵嶏紝浣嗘槸澶皯浜嗏斺旇嚦灏戝浜庡崰浜哄彛60%鐨刡eta鏉ヨ澶皯浜嗐傚摢閲屾瘮寰椾笂澶╃敓寮烘倣鐨刟lpha鍑哄僵锛?br />
鈥滅鐟炪傗濈鐟炰篃娌℃湁鎶ュ嚭浠栫殑濮撱?br />
鍗$憺濞滃苟涓嶅湪鎰忕溂鍓嶈繖涓湁鐫娴撶儓浼忕壒鍔犻厭鍛崇殑鐢蜂汉鍙粈涔堚斺旀瘯绔熶粬淇╃函灞炶悕姘寸浉閫㈤『甯﹀仛浜嗗満涓嶅お鍏夋槑鐨勪氦鏄撱傚鍗$憺濞滄潵璇达紝浠栦滑鐢氳嚦杩炰氦鎹㈠悕瀛楃殑蹇呰閮芥槸娌℃湁鐨勩?br />
涓嶈繃杩欐槸鍗$憺濞滅涓娆¤涓存椂鏍囪锛岃繕鏄邯蹇典竴涓嬩粠鏌愮瑙掑害甯姪鍗$憺濞滃紑鑽ょ殑绉戠憺鍚с?br />
灏界鍗$憺濞滃苟娌℃湁浠庤繖鍦哄寙蹇欑殑鎱拌棄褰撲腑鎰熷彈鍒颁换浣曞揩鎰熴?br />
涓や汉浜掓姤浜嗗悕瀛椾箣鍚庡氨娌℃湁鍐嶈杩囪瘽銆?br />
鍗$憺濞滆汉鍒板湪妞呭瓙涓婂紑濮嬪皬鎲╋紝姣曠珶鍦ㄦ湰瀹惰繕鏄墦璧?2鍒嗙殑绮剧鏉ュ浠樹竴浜涢夯鐑︾殑浜恒?br />
绉戠憺鍒欐槸鍦ㄦ參鎱㈡偁鎮犲湴杩炴帴鑷繁鐨勬櫤鑳界瀹讹紝鎷ユ湁鍗$憺濞滆繖涓悕瀛楃殑浜哄叏鏄熼檯鑷冲皯鏈変笂鐧句竾鐨勪汉锛屼絾鏄鐟炵殑鏉冮檺寰堝ぇ锛屼粬杞绘澗鐨勬壂鎻忓埌浜嗗崱鐟炲鐨勬暣涓韩浣擄紝閫氳繃瀵归鏋剁殑鍒嗘瀽锛屼粬杞昏屾槗涓惧湴灏卞緱鍒颁簡鍗$憺濞滅殑鍏ㄩ儴淇℃伅銆?br />
鍙滃崱鐟炲杩樺湪鐫″ぇ瑙夛紝瀹屽叏涓嶇煡閬撹嚜宸辩殑搴曡¥閮界粰鎷斾簡涓共鍑銆?br />
鈥淪terling锛熷皬鍒虹尙杩樻槸鍙簿璐电殑鍒虹尙锛熲濈鐟炵幇鍦ㄧ洰鍏夊彧鑱氶泦鍦ㄩ偅涓粠淇℃伅搴撳綋涓烦鍑烘潵鐨勫姘忋備絾鏄笅涓绉掍粬绔嬮┈鍚﹀畾浜嗚繖涓粨璁猴紝姣曠珶鍗$憺濞滃お涓嶅儚鏄粠灏忓▏鍏婚暱澶х殑beta銆傚ス鐨勯噹鎬у拰鐖墮骞堕潪鏅歜eta鎵鏈夌殑銆?br />
绉戠憺鎯冲埌鍗$憺濞滃湪鍜屼粬鍛ㄦ棆浜ゆ槗鐨勬椂鍊欑殑妯℃牱銆?br />
浣嗘槸韬唤淇℃伅
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