New Coke

New Coke

In 1985, Coca-Cola (KO) tried to improve the formula for its flagship cola product, but many customers fiercely rejected "the new taste of Coca-Cola." The company soon reintroduced its original formula, calling it "Coca-Cola Classic."

Introduced: Apr. 23, 1985
Immediate stock impact: Up 66% in New Coke's first year, though all gains occurred after the reintroduction of the original formula in July.
Long-term performance: During the rest of the 1980s, Coca-Cola's stock price doubled.