Why bse changes circuit filter consistently?

#1
HELLO
MY QUERY IS "WHY BSE CHANGES CIRCUIT FILTER CONSISTENTLY FOR THE SCRIPS?"
FOR EG;MIC ELECTRONICS
I'VE SEEN 10%,20%,5%,10% AND AGAIN 5% FILTER LEVEL FROM TOMORROW
WHY IT IS SO?
PLZ CLARIFY.:clap:
 

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