t l k¨¨o ngha ca vic soi cu x s Kh¨¢m ph¨¢ s lc v c¨¢ch chi b¨¤i c¨¤o hiu r hn, ch¨²ng ti gi s bn t 100k v¨¤o ca Malaysia vi t l -0.5. Khi ¨®, tin li ca bn s l¨¤ 100k / [0.5 x (-1)] = 200k. N¨ºn nh rng, 200k ch l¨¤ tin li, nh vy c¨¢c bn nu d o¨¢n chin thng s thu v tng s tin l¨¤ 300k. V¨ª d n¨¤y mt nh¨¤ u t s dng 100$ tham gia t¨¤i 2.25 vi t l thng 0.83, ngi n¨¤y s n hoc mt tin thng theo c¨¢c trng hp sau: K¨¨o t¨¤i xu n.5 hay n 1/2 Mi trn u ¨¢ g¨¤ ca st u i k¨¨m vi nhiu loi k¨¨o c¨¢ cc kh¨¢c nhau, t ¨® to ra s hp dn cho nhng ai y¨ºu th¨ªch c¨¢ cc. M¨¢ch bn mt s mo chi k¨¨o c hi k¨¦p hiu qu Th t l¨¢ b¨¤i Quan s¨¢t t l k¨¨o 2 ¨C i kh¨¢ch : Cc i kh¨¢ch gi¨¤nh chin thng Tng s b¨¤n thng thc t ln hn n: Chn t¨¤i bn thng cc, chn xu bn thu ht tin cc.

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