what happened with the silver rule 7 is different from the tulip craze.
Hunt brothers buy a bunch of silver, lots on margin (bank borrowed), government saw what was happening and literally changed the rules of the market to force them to mass liquidate when they couldn't meet a margin call (all of the sudden). https://en.wikipedia.org/wiki/Silver_Thursday
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what happened with the silver rule 7 is different from the tulip craze.
Hunt brothers buy a bunch of silver, lots on margin (bank borrowed), government saw what was happening and literally changed the rules of the market to force them to mass liquidate when they couldn't meet a margin call (all of the sudden). https://en.wikipedia.org/wiki/Silver_Thursday