6 companies started trading in 1927 or 1928 and got absolutely smashed... developers, explorers that ran into funding / debt problems? Another 3 were penny stocks (< $1), also smashed.
4 look like they were purely silver or gold / silver companies. All did poorly.
3 did OK including Homestake, which had share prices higher than $10 in 1929. Were presumably majors with established gold production.
Newmont did poorly. I recall reading they were mainly a copper miner in the 1920’s and their small gold mine enabled them to survive. Not that it helped their share price much.
