Post #6256 by mungofitch on the Berkshire Hathaway board

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Stocks A to Z / Stocks B / Berkshire Hathaway (BRK.A) ❤

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how did you buy in pre-market??

I use Interactive Brokers.
On their trading program TWS, there is a pull-down for the time-in-force column for the order. It defaults to "day order", but you can also click the "Fill outside RTH" box (regular trading hours).
The separate order type defaults to limit order, which I *always* use, and as others noted I think a limit is mandatory for pre-market orders.

I'm sure some other brokers offer a similar feature.

The bid/ask is quite wide outside regular trading hours, but also sometimes has interesting wild swings.
I was surprised that this order was filled largely as a collection of 22 odd lots, most of which were fewer than 10 shares. I guess it's what Wall St would call an early start on amateur hour.

Jim

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