Use a matched denominator
For each trading session, pair the issuer’s completed purchases with total volume for the same share class, venue coverage, and session. A purchase of 100,000 shares against 500,000 traded is 20% participation. Do not divide dollar repurchases by share volume.
Aggregate shares before calculating the percentage
Consider two sessions: 100,000 of 200,000 shares, then 100,000 of 1,000,000 shares. The simple average of 50% and 10% is 30%, but the correct combined participation is 200,000 divided by 1,200,000, or 16.67%. The larger session must receive its full weight.
Distinguish intensity from persistence
An issuer can buy heavily on one date and disappear the next. Inspect the active-session count and individual observations. Missing rows do not prove zero buying. A convincing persistence claim needs a complete exchange calendar and the relevant disclosures for every session.
Interpret the result cautiously
High participation describes a source of demand. It does not establish undervaluation, cancellation of the acquired shares, or future buying. Inspect remaining authorization, financing, insider transactions, and any offsetting share issuance separately.
Sources and further reading
This guide explains a tool and its assumptions. It is not personalized financial, tax, or legal advice.
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