National Western Life Insurance Co (Nasdaq:NWLI), Santander Bancorp (Nasdaq:SBP) and Fuel Systems Solutions Inc (Nasdaq:FSYS) are among the biggest percentage losers in Monday's trading among companies with market capitalizations under $1 billion.

Also included among the results: LMI Aerospace Inc (Nasdaq:LMIA), Comfort Systems USA, Inc (Nasdaq:FIX), Integral System Inc (Nasdaq:ISYS), Nu Skin Enterprises, Inc (Nasdaq:NUS), Fresh Del Monte Produce Inc (Nasdaq:FDP) and Kenneth Cole Productions Inc (Nasdaq:KCP).

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