SEC moves overnight price snapshot earlier to give trading venues more preparation time

The SEC has advanced the planned price snapshot for US overnight protections. A 7 October order, published in the Federal Register on 13 October, temporarily puts LULD Amendment 29 into effect, moving the reference from 7:45 p.m. to 7:30 p.m. Eastern Time.[1]

The change gives alternative trading systems more time to calculate and distribute comparable bands before their 8 p.m. sessions. The SEC says it should reduce implementation risk around the transition from post-market trading. The amendment changes the snapshot time, leaving the wider overnight framework intact.[1]

That framework, approved in August, combines the stock’s official closing price with the evening consolidated price. For an ordinary stock, the basic lower band is 20% below the lower reference; the upper band is 20% above the higher reference. Separate minimum dollar distances and leveraged-product adjustments also apply.[2]

For a hypothetical ordinary stock closing at $100 with an evening reference of $110, the basic calculation produces an $80 lower band and a $132 upper band. This illustrates how the mechanism can accommodate a post-close price move while setting outer trading limits. It is a permitted price range, not a forecast or an assurance that buyers and sellers are available throughout it.[2]

The initial protected period runs from 9 p.m. to 4 a.m. Eastern Time on the relevant overnight sessions. Trading centres must prevent trades and displayed prices outside the bands. Hitting a band does not automatically trigger a trading pause, although the primary listing exchange can impose a regulatory halt.[2]

Operational use is anticipated for 6 December, subject to CTA and UTP processor changes and an announced operative date. Comments close on 3 November. Temporary effectiveness extends no later than 10 February 2027; a later Commission decision remains required. Brokers therefore have a specific reference-time change to build and test before the intended launch.[1]

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