| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
Fire | +4.5 — | O 178.5 — | 100%100% | 100% Kalshi |
Mercury | -4.5 — | U 178.5 — | 0%0% | — |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
Portland Fire | +4.5 — | O 178.5 — | 100%100% | 100% Kalshi |
Phoenix Mercury | -4.5 — | U 178.5 — | 0%0% | — |
Phoenix is the 68c home favorite (68c Kalshi, 68c Polymarket) over a Portland Fire team that is the better side in the standings at 14-20 to the Mercury’s 13-22. This is the steepest price the expansion Fire have faced in a week: they were a 43c underdog at Seattle on August 14 and won that game 84-82. Two independent books landed on 68c to the cent, and the board carries roughly $22.3K in cumulative volume. Tip is 4:00 PM local at Mortgage Matchup Center in Phoenix, and the market resolves on the final score the same day.
The Portland Fire vs Phoenix Mercury market is the one WNBA line on the August 16, 2026 slate where the price and the standings point in opposite directions. Portland sits 14-20 and a game and a half clear of Phoenix at 13-22 in the Western Conference, and the Fire arrive on a road win. Phoenix is still the 68c favorite. The market is paying for home court and for Alyssa Thomas, not for the record.
Phoenix is 13-22 overall and 5-10 at Mortgage Matchup Center, a home mark worse than its 8-12 road record. The Mercury went 2-3 over their last five, winning at Chicago 106-101, then losing at Atlanta 96-82, at Connecticut 75-72 and at Washington 95-75 before beating Los Angeles 94-87 on August 11. Kelsey Plum is out with left calf soreness and ESPN lists a return date of August 22, which leaves Kahleah Copper (20.6 PPG) and Alyssa Thomas (14.8 PPG, 7.4 RPG, 8.2 APG) carrying the offense. Thomas leads Phoenix in both rebounds and assists, and she is the single reason a 13-22 team prices as a 68c favorite.
The Portland Fire are 14-20 in their expansion season and 6-10 on the road, and they are 3-2 in their last five: a 106-101 loss to Los Angeles, wins over Toronto 97-83 and Seattle 100-93, an 85-81 loss to Minnesota, and an 84-82 win at Seattle on August 14. That Seattle game is the useful comparison. Portland was a 43c underdog there and won outright. Two days later the same team is a 34c underdog, a 9c steeper price, because the venue changed and the opponent is better than 7-29 Seattle. Carla Leite leads Portland at 15.5 PPG and 6.2 APG, and Emily Engstler leads the Fire on the glass at 5.3 RPG. Portland is without Sarah Ashlee Barker (knee surgery), Sania Feagin (knee) and Luisa Geiselsoder (personal) for the rest of the season.
The two teams have met once. Phoenix won 78-72 in Portland on June 5, a 150-point combined game that landed well under the number this board is pricing today. Phoenix leads the season series 1-0 with the rematch in Portland set for September.
Line movement has been quiet. Kalshi opened the Phoenix side at 67c when the board came up on the evening of August 15, traded down to 66c through the middle of the night, and printed 68c on the last refresh. Polymarket has held Portland at 33c on every single snapshot in the series. Kalshi and Polymarket agree to the cent on Phoenix at 68c and are 1c apart on Portland (34c Kalshi, 33c Polymarket), so the cheapest way to buy the Fire is on Polymarket. There is no meaningful cross-platform disagreement to work with here, which is itself the signal: two independent books landed on the same number.
The spread ladder brackets Phoenix at roughly five points. Kalshi prices Phoenix -1.5 at 64c, Phoenix -4.5 at 53c, Phoenix -7.5 at 42c and Phoenix -10.5 at 33c, while Polymarket lists Phoenix -5.5 at 51c. The -4.5 rung is the most-traded spread contract on the board at roughly $1.5K, and its 53c print is the market's honest read: Phoenix by five, a coin flip either side of it. That is consistent with a 68c moneyline. Portland's own spread rungs stay cheap, with Portland -1.5 at 33c and Portland -3.5 at 29c.
The total is where the real money sits. Over 175.5 on Kalshi carries about $9.0K in cumulative volume, more than any contract on the board except the two moneyline legs, and it prices at 52c. Polymarket's O/U 176.5 sits at 49c. The ladder runs from Over 163.5 at 80c down through Over 169.5 at 68c, Over 181.5 at 40c and Over 187.5 at 25c, so the market's number is right around 176. Portland's last five have gone 207, 180, 193, 166 and 166 combined points, which straddles that line. Phoenix without Plum has been the slower half of this matchup, and the June meeting produced only 150.
Player props are thin. Bridget Carleton assists over 2.5 at 43c on Polymarket is the only prop contract on the board carrying a two-sided price. The rest of the prop ladder, including Copper points over 21.5 and Thomas rebounds over 8.5, is listed without a live quote, so there is nothing tradeable to read from it yet.
The moneyline resolves to the team that wins the game outright at Mortgage Matchup Center in Phoenix on August 16, 2026, with a scheduled 4:00 PM local tip. Spread contracts settle against the final margin and total contracts against combined final points, including any overtime. Both Kalshi and Polymarket settle from the official WNBA final score, normally within hours of the buzzer. There is no draw outcome in WNBA basketball, so the two moneyline legs are a complete two-sided market.
Kelsey Plum availability: Plum is out with left calf soreness and ESPN carries an August 22 return date, so Phoenix prices as a 68c favorite without its highest-usage guard.
Alyssa Thomas usage: Thomas leads Phoenix in both rebounds (7.4) and assists (8.2) and is the structural reason a 13-22 home team is favored over a 14-20 road team.
Portland rest and travel: the Fire won 84-82 at Seattle on August 14 and travel to Phoenix on one day of rest, with three rotation players out for the season.
Phoenix home record: the Mercury are 5-10 at home and 8-12 on the road, so the home-court premium baked into the 68c line is not supported by their own splits.
The 176 total: Over 175.5 at 52c on Kalshi is the highest-volume contract on the board outside the moneyline, and the June meeting between these teams produced only 150 combined points.
Portland's previous game, the 84-82 win at Seattle on August 14, is the cleanest read on how this market has been pricing the Fire on the road. Phoenix's last win, against Los Angeles on August 11, shows how the board handles the Mercury at home without Plum. Full cross-platform boards for both clubs live on the Portland Fire and Phoenix Mercury team hubs, and every game on the slate is on the WNBA hub.
The moneyline resolves to the team that wins the game outright at Mortgage Matchup Center in Phoenix on August 16, 2026, with a scheduled 4:00 PM local tip. Each winning contract pays $1 per share and the losing side settles at $0. Spread contracts settle against the final margin of victory and total contracts against combined final points, in both cases including overtime. Kalshi and Polymarket both settle from the official WNBA final score, normally within hours of the final buzzer. If the game is postponed, both platforms carry the contract to the rescheduled date; if it is canceled outright, contracts void and settle per each platform’s cancellation rules.
As of August 16, 2026, Phoenix is the 68c favorite on both Kalshi and Polymarket and Portland trades at 34c on Kalshi and 33c on Polymarket. A 68c price implies roughly a 68% chance Phoenix wins the game.
Phoenix is favored despite a 13-22 record against Portland at 14-20. The market is pricing home court and Alyssa Thomas, who leads the Mercury at 7.4 rebounds and 8.2 assists per game, rather than the standings.
Kalshi prices Phoenix -4.5 at 53c, the most-traded spread rung on the board, and Polymarket lists Phoenix -5.5 at 51c. The total sits around 176, with Over 175.5 at 52c on Kalshi and O/U 176.5 at 49c on Polymarket as of August 16, 2026.
Both Kalshi and Polymarket list this game. Kalshi carries the deeper book with roughly $20.8K of the board’s $22.3K in cumulative volume, plus the full spread and total ladders; Polymarket lists the moneyline, one spread rung, one total and a Bridget Carleton assists prop.
It resolves on the final score of the game at Mortgage Matchup Center on August 16, 2026, tipping at 4:00 PM local time. Both platforms settle from the official WNBA box score, normally within hours of the buzzer.
Watch the Phoenix injury report beyond Plum, and watch the total. Over 175.5 at 52c is the highest-volume contract on the board outside the moneyline, and these teams combined for only 150 points in their June 5 meeting.