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A tokenized stock follows a real share. The real share trades on NYSE or Nasdaq, Monday to Friday, 9:30 to 16:00 New York time, except holidays. The token trades on-chain all the time. When New York is closed, nothing anchors the token’s price. It can drift away from Friday’s close, and the pools are thinner, so selling moves the price more.

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How Tozzecard measures it

Binance’s price data has no independent price for the real share: its “reference price” is worked out from the on-chain price. So the API keeps its own anchor:
  1. While the market is open, it records the per-share price every minute.
  2. At the close, the last one stays as the close reference.
  3. While the market is closed, the spread is how far the price you could actually get is from that close:
ratio is how many shares one token stands for. You can see each stock’s spread in GET /market.

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What the agent does with it

It sells while the market is open, before the close, so the card already has what you’ll spend over the weekend. If the card still runs low while the market is closed, it sells only the minimum, and only if the spread is within 1%. See How refills work.