Komercni Banka AS (KOMB) fell the most in a week, leading Czech shares lower for a third week.
The unit of Societe Generale SA slid as much as 1.6 percent, the biggest decline since March 16, and traded 0.9 percent weaker at 3,680 koruna by 11:43 a.m. in Prague. The 14- member PX (PX) index, where Komerni Banka has a 17 percent weighting, retreated 0.5 percent.
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