In a measured but consequential act, the U.S. Securities and Exchange Commission has opened a five-year experimental corridor for tokenized stock trading on blockchain platforms, lifting regulatory barriers that long kept distributed ledger technology at the margins of American equity markets. The move acknowledges that the architecture of financial exchange — its hours, its settlement rhythms, its gatekeepers — is no longer fixed by necessity, but by convention. Whether this exemption becomes a permanent reordering of how ownership changes hands, or a cautionary chapter in the history of fina