Trong bt c mt trn u b¨®ng ¨¢ n¨¤o, chin thut m¨¤ c¨¢c i ¨¢p dng u c¨® nh hng rt ln ti kt qu. iu n¨¤y c th hin r n¨¦t nht trong trng hp hai i c¨® sc mnh tng ng. Khi ¨®, i c¨® chin thut ph¨´ hp v¨¤ li chi hiu qu hn s c¨® c chin thng. Bi vy, c¨¢c bn tuyt i khng c b qua yu t quan trng n¨¤y. Mi trn thng k¨¦o d¨¤i t 10 n 15 ph¨²t, nhng cng c¨® trng hp m¨¤n so t¨¤i kt th¨²c ch trong v¨°ng 2 ph¨²t. Nghi¨ºn cu tn sut v¨¤ quy lut xut hin s Kt lun Kt lun T¨®m tt ni dung Qun l xu l¨¤ yu t quan trng chi lu d¨¤i trong Bn C¨¢ X¨¨ng. Khng n¨ºn bn qu¨¢ nhiu v¨¤o mc ti¨ºu nh khi lng xu hn ch. Tng dn xu khi im thng cao, tr¨¢nh ri ro. Nn tng h tr ngi chi thng k¨º xu ti¨ºu v¨¤ xu kim, gi¨²p lp k hoch hiu qu. Ngi chi c¨® th t mc ti¨ºu mi v¨°ng, m bo phn thng trung b¨¬nh 50 ¨C 200 xu mi lt bn. Nh vy, ngi chi h ch quan tm n kt qu thng thua ch khng quan tm n s b¨¤n thng ghi c. K¨ª hiu chung nh sau: Qun l ngn s¨¢ch: Khi tham gia chi, bn cn chn mc cc ph¨´ hp vi bn thn tr¨¢nh ri ro khng ¨¢ng c¨®. Vic t cc hp l s gi¨²p hi vi¨ºn c¨® th duy tr¨¬ ngun t¨¤i ch¨ªnh. Nu bn chn 12 v¨¤ thng, s tin bn nhn c l¨¤ chin thng = 1/(1/t l k¨¨o 1 + 1/t l k¨¨o 2). Kt lun Ta c¨® cng thc sau:

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