The Mexico-focused miner has benefitted from an ongoing silver rally and even more so than many of its peers, as it chose not to diversify into other metals.
Having hit a target, silver has formed what is believed to be an intermediate top over the past five weeks or so, which it should soon start to descend from, says technical analyst Clive Maund.
It’s not yet clear whether it will be generally approved by securities regulators as a defensive mechanism for all other public companies facing hostile takeovers.