video1.0<iframe src="https://www.loom.com/embed/c0e29c53065a4f43ae76a40bc9a80007" frameborder="0" width="1920" height="1440" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>14401920Loomhttps://www.loom.com14401920https://cdn.loom.com/sessions/thumbnails/c0e29c53065a4f43ae76a40bc9a80007-830a89ac26053130.gif195.392This Loom explains a Uniswap V4 hook called Closing Bell for tokenized stock pools that adjusts fees as the market closes and reopens. While the market is open the hook is invisible, but from Friday close the pool stays open through Monday night, and fees rise during Saturday, Sunday, and Monday based on the closing clock, including holidays like Labor Day. A demo shows fees jumping to 0.81 percent on Sunday at 9 a.m. compared with about 0.15 percent overnight on Monday, then dropping to roughly 1.35 compared with over 8 on the weekend.