Orders Acceptance Matrix

Order handling behavior varies by asset type and trading session. Atomic Vaults operates five consecutive sessions that together cover the full 24-hour trading day.

Trading Sessions

Session	Hours (ET)
AV1	4:00 AM – 7:00 AM
AV2	7:00 AM – 9:30 AM
AV3	9:30 AM – 4:00 PM
AV4	4:00 PM – 8:00 PM
AV5	8:00 PM – 4:00 AM

Whole NMS Stocks

Session	Order Types Accepted	Order Types Executed	TIF Accepted	TIF Executed	Modifies	Short Selling
AV1	market, limit, stop-limit, stop	limit	IOC, GTC, Day	IOC, GTC, Day	Yes	Yes
AV2	market, limit, stop-limit, stop	market, limit	IOC, GTC, Day	IOC, GTC, Day	Yes	Yes
AV3	market, limit, stop-limit, stop	market, limit, stop-limit, stop	IOC, GTC, Day	IOC, GTC, Day	Yes	Yes
AV4	market, limit, stop-limit, stop	market, limit	IOC, GTC, Day	IOC, GTC, Day	Yes	Yes
AV5	market, limit, stop-limit, stop	limit	GTC, Day	GTC, Day	Yes	Yes

Fractional NMS Stocks

Session	Order Types Accepted	Order Types Executed	TIF Accepted	TIF Executed	Modifies	Short Selling
AV1	market, limit	N/A	GTC, Day	N/A	No	No
AV2	market, limit	N/A	GTC, Day	N/A	No	No
AV3	market, limit	market, limit	GTC, Day	GTC, Day	No	No
AV4*	market, limit	N/A	GTC, Day	N/A	No	No
AV5	market, limit	N/A	GTC, Day	N/A	No	No

OTC Stocks

Session	Order Types Accepted	Order Types Executed	TIF Accepted	TIF Executed	Modifies	Short Selling
AV1	limit	N/A	GTC, Day	N/A	Yes	No
AV2	limit	N/A	GTC, Day	N/A	Yes	No
AV3	limit	limit	IOC, GTC, Day	IOC, GTC, Day	Yes	No
AV4*	limit	N/A	GTC, Day	N/A	Yes	No
AV5	limit	N/A	GTC, Day	N/A	Yes	No

Options

Session	Order Types Accepted	Order Types Executed	TIF Accepted	TIF Executed	Modifies	Short Selling
AV1**	market, limit, stop-limit, stop	market, limit	GTC, Day	Day	Yes	No (STO accepted but not executed; BTC is executed)
AV2**	market, limit, stop-limit, stop	market, limit	GTC, Day	Day	Yes	No (STO accepted but not executed; BTC is executed)
AV3***	market, limit, stop-limit, stop	market, limit, stop-limit, stop	IOC, GTC, Day	IOC, GTC, Day	Yes	Yes
AV4*	market, limit, stop-limit, stop	N/A	GTC, Day	N/A	Yes	No (STO accepted but not executed)
AV5	market, limit, stop-limit, stop	N/A	GTC, Day	N/A	Yes	No (STO accepted but not executed)

Footnotes

• * Orders are accepted but Day orders are canceled back at 8:00 PM ET.
• ** Supported via the pre-market options trading feature.
• *** Some ETF options trade until 4:15 PM ET.