"If we could have any security against moods! If the profoundest prophet could be holden to his words, and the hearer who is readyto sell all and join the crusade, could have any certificate that to-morrow his prophet shall not unsay his testimony!"

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My father and grandfather were stockbrokers, and they would actually take stock certificates from a vault, give it to a runner, and send it to another vault. Then somebody said, "Let's digitize it and have one vault." Now the DTCC clears and settles almost everything, and the cost of doing a trade is a tenth of what it was before.

— Jamie Dimon