TREE NEWS update: China Securities Index Co. will temporarily adjust the constituents of the CSI 1000 and CSI 500 indexes, effective after market close on October 9, 2026. Fulede will be added to the CSI 500 while being removed from the CSI 1000, and Qilun Technology will be added to the CSI 1000. ST Lianguang will be removed from the CSI 500.
CSI Indexes Make Temporary Adjustments to CSI 1000 and CSI 500 Constituents
Temporary constituent changes outside the regular review cycle typically signal corporate events — index provider rules often force such adjustments after listings, delistings or risk designations — so the Fulede switch between the two benchmarks and ST Lianguang's removal read as rule-driven housekeeping rather than a change in index methodology. The practical effect lands on passive vehicles tracking the CSI 500 and CSI 1000, which must rebalance around the October 9 close. Whether these names stay put until the next scheduled review is the open question.
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