Hindsight Market

The Graveyard › 1985

Cooper Laboratories

COO · Unknown · NYSE · in our data May 3, 1971 to June 7, 1985 (14.1 years)

The first trading day in our data for Cooper Laboratories is May 3, 1971 (its first day in our records, which may be later than its listing and is not its founding). At its peak, on June 6, 1983, the market valued it at $691 million. It left the market without a crash, last trading at $13.62. Our data does not say why it stopped trading. Many companies end this way when they are bought, merged or taken private.

1971-051985-06
Peak market value$691 millionJune 6, 1983
Highest split-adjusted share price$26.37July 2, 1984
Last share price$13.62June 7, 1985
From its split-adjusted high to the end-48.3%
Return over the days in our data+340.8%with dividends, before the last trade
Worst single day-24.0%June 6, 1973

Share prices are adjusted for splits and other share changes, so the high and the last price compare like for like; the peak market value is as it was on the day. The return covers the trading days in our data only: it does not include what holders received, or lost, after the last trade (a merger payout, a bankruptcy), and it does not reach back before 1971. How these numbers are made · Report a data issue.

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Also gone in 1985: Unknown