How did Warren Buffett start his investment in Coca-Cola in 1988 and hold until today?

How did Warren Buffett start his investment in Coca-Cola in 1988 and hold until today?

My Answer :

Warren Buffett had discovered Coca Cola was having Double Digits in ROA and ROIC.

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Why ROA & ROIC?

My Answer:

ROA reflects the Depth of Competitive MoAT Advantage.

ROIC reflects the Depth of Compounding Rate, Length of Compounding Runway and Intrinsic P/E.

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https://www.gurufocus.com/news/205476/revisiting-buffett-cocacola-in-1988