The house's fair value in a market is its written position, the editorial Call of the question, dated and with its history on the market page. Around it the house sets a spread that widens with the uncertainty of its source (tier F2: a measured base rate blended with the Call; tier F2b: the Call alone, with a wider spread and smaller size) and skews with its inventory: the more it holds of one side, the less it pays for more of it.
Every quote is a passive order through the same door as a reader's, valid for 180 seconds and renewed, marked "house" in the book. The house withdraws a side when its inventory reaches Q, pauses when its source is stale, and never sets a settlement price: a market settles by the reading of its named source, by an instruction DeepStack signs. The house's own number for a market is published after the close.
House volume is a cost of making markets, not traction: the figures below keep it apart from readers' volume.