The Korea Exchange seeks to introduce a tiered system for the Kosdaq, drawing on Nasdaq’s model to distinguish high-quality companies. The system could launch in the second half of next year at the earliest, pending companies’ annual results. The KRX is considering dividing Kosdaq-listed firms into upper and lower tiers, financial industry sources said Friday. The upper tier, tentatively named the “Select Segment,” would include companies meeting quantitative criteria, including financial perfor