WMID

Midterm Control — the basket

SlateMonthly

The real markets behind this index, across every venue that lists them, tracked as one spread. Instead of reading a single contract, you read the theme — which is what a multi-week position is actually exposed to. Each holding links straight to its venue; W.E.T. never handles orders, you trade at the exchange.

Basket level · official print36 held · close 2026-09-14
994.06−0.59%since inception · base 1000

hypothetical · mid marks · before fees, spread and slippage

Basket performance

hypothetical · mid marks · before fees, spread and slippage
Basket total return
994.06
Since inception
−0.59%
Cost to cross
0.60pts
Holdings marked
44.4% of 36
1 day
+1.70%
7 day
+2.08%
Markets held
36
Settled
0
Rebalanced out
0
Hit rate
Cash
50.3%
Inception
2026-08-01
Weighting
Equal notional
Marks
Two-sided mid
Days tracked
41

Equal notional from each holding’s inception mark, re-marked at the two-sided mid. Percentages only, size-blind — never a cash figure and never a performance claim.

Cost to cross is the weighted half-spread at the touch on the newest mark tape: what entering at the quote rather than the midpoint would have cost. It is the price of the FIRST unit and says nothing about the tenth — the resting size beside each holding is published so a reader can judge whether their own size fits. It is not deducted from any return above.

A published measurement of what these markets did together. Not an account, not directly investable; W.E.T. never handles orders.

Holdings · 36 markets

held since 2026-08-01 · the reading above is computed over today's roster, which differs
MarketNowReturn
  • Will the Democratic Party control the House after the 2026 Midterm elections?polymarket · YES · entry 86c1.0¢ spread · 266.3k/357.8k within 5¢87c+1.2%
  • 2026 Balance of Power: D Senate, D Housepolymarket · YES · entry 45c1.0¢ spread · 108.0k/95.8k within 5¢53c+18.0%
  • Will the Republican Party control the Senate after the 2026 Midterm elections?polymarket · YES · entry 56c1.0¢ spread · 44.5k/94.0k within 5¢48c−14.4%
  • Democratic Party — Which party will win the U.S. House?gemini · YES · entry 85c1.0¢ spread · 3.8k/3.5k within 5¢85c0.0%
  • Will Mary Peltola win the Alaska Senate race in 2026?polymarket · YES · entry 61c1.0¢ spread · 9.0k/22.9k within 5¢68c+11.6%
  • Republicans win Trifecta with Senate Supermajority in midterms?polymarket · YES · entry 5c0.9¢ spread · 27.7k/2.1k within 5¢3c−34.3%
  • Will Tom Begich win the 2026 Alaska governor election?polymarket · YES · entry 28c1c−95.1%
  • Before 2027? — Will crypto market structure legislation become law?gemini · YES · entry 33c1.0¢ spread · 1.1k/718 within 5¢39c+18.5%
  • Will the Democratic Party win the CA-15 House seat?polymarket · YES · entry 95c1.0¢ spread · 5.1k/679 within 5¢96c+1.1%
  • Will the Republican Party win the FL-01 House seat?polymarket · YES · entry 96c1.0¢ spread · 203/509 within 5¢96c0.0%
  • Before 2027 — Will the US buy at least part of Greenland?gemini · YES · entry 4c5.0¢ spread · 2/822 within 5¢6c+57.1%
  • Xavier Becerra — California Governor winner?gemini · YES · entry 96c1.0¢ spread · 1.5k/6.7k within 5¢96c0.0%
  • Will the Republican Party win the MS-01 House seat?polymarket · YES · entry 94c13 sessions stale95c+1.1%
  • Will the Republicans win the Nebraska Senate race in 2026?polymarket · YES · entry 71c11 sessions stale69c−2.8%
  • SAVE Act becomes law? — Will the SAVE Act become law?gemini · YES · entry 7c13 sessions stale7c0.0%
  • New Virginia congressional map used in the midterms?polymarket · YES · entry 4c4c0.0%
  • Will the Democratic Party win the WI-02 House seat?polymarket · YES · entry 94c13 sessions stale97c+3.1%
  • Republican Party — Which party will win the U.S. Senate?gemini · YES · entry 56c52c−8.8%
  • Will there be another US government shutdown by January 31 and will the Democratic Party win the House in 2026?polymarket · YES · entry 86c0.4¢ spread · 40.1k/6.3k within 5¢86c−0.2%
  • Blue wave in 2026?polymarket · YES · entry 75c13 sessions stale73c−2.7%
  • Will the Democratic Party win the CA-16 House seat?polymarket · YES · entry 94c13 sessions stale98c+4.7%
  • Will the Republican Party win the WV-02 House seat?polymarket · YES · entry 94c13 sessions stale96c+2.2%
  • Will the Democratic Party win the CA-28 House seat?polymarket · YES · entry 94c13 sessions stale98c+4.5%
  • Will the Republican Party win the WV-01 House seat?polymarket · YES · entry 94c13 sessions stale97c+3.3%
  • Will the Democratic Party win the MI-11 House seat?polymarket · YES · entry 94c13 sessions stale96c+2.1%
  • Will the Republican Party win the OK-03 House seat?polymarket · YES · entry 94c13 sessions stale96c+2.7%
  • Will the Democratic Party win the HI-02 House seat?polymarket · YES · entry 96c13 sessions stale96c0.0%
  • Will the Republican Party win the VA-09 House seat?polymarket · YES · entry 93c13 sessions stale96c+2.8%
  • Will the Democratic Party win the IL-04 House seat?polymarket · YES · entry 94c13 sessions stale95c+1.5%
  • Will ACA premium tax credits not be extended and will the Democratic Party win the House in 2026?polymarket · YES · entry 81c11 sessions stale89c+9.9%
  • Marine Le Pen — French Presidential Election Winner 2027?gemini · YES · entry 33c39c+18.5%
  • Will the Republican Party win the VA-06 House seat?polymarket · YES · entry 91c13 sessions stale93c+2.2%
  • Will the Democratic Party win the CA-50 House seat?polymarket · YES · entry 94c37 sessions stale94c0.0%
  • Will the Democratic Party win the LA-02 House seat?polymarket · YES · entry 95c37 sessions stale95c0.0%
  • Christopher Luxon — Which world leaders will leave office in 2026?gemini · YES · entry 48c37 sessions stale44c−7.4%
  • Will the Republican Party win the TX-24 House seat?polymarket · YES · entry 84c37 sessions stale85c+1.2%

All markets resolve YES · 5 of 36

a computed statistic about this watchlist — not an instrument, not offered anywhere

The chance that every one of these markets resolves YES. It is the mathematical opposite of the basket above: the basket is a weighted mean, where one loss doesn't zero it; this is a product, where every market must land. Same markets, opposite risk shape — which is the whole reason to show them together.

The markets shown are this index's most likely holdings, added while the joint probability stays above 1%. Ranking by portfolio weight instead would be arbitrary here, since equal-notional weights are near-identical by design.

If independent
86.40%
Π of the individual probabilities
True range · any correlation
85.696.3%
Fréchet–Hoeffding bounds · 10.7pp wide
YESWill the Democratic Party win the CA-16 House seat?98%
YESWill the Democratic Party win the CA-28 House seat?98%
YESWill the Democratic Party win the WI-02 House seat?97%
YESWill the Republican Party win the WV-01 House seat?97%
YESWill the Republican Party win the WV-02 House seat?96%

Multiplying probabilities assumes the markets are independent — which is precisely wrong for markets grouped by a shared theme, since correlation is why they sit in one index. The range is therefore the honest answer: the true joint probability sits inside it under any correlation structure, with no covariance estimate required.

This is a statistic, not a product. W.E.T. does not offer, quote, accept or route a combined position in these markets, and no venue is quoting one here — the figures are computed by W.E.T. from individual market prices. Each market above trades on its own venue, individually, at the links in the holdings table. Data, not advice.

How to read this

The basket holds equal notional in each market from its inception mark, so every holding counts equally in return terms rather than the biggest contract dominating. The level is that combined position, re-marked daily at the two-sided mid and rebased to 1000. Settled markets convert to cash at their payoff and wait for the next monthly review.

This is a published benchmark, not an account and not a product: the index is not directly investable. Marks are mid quotes before fees, spread and slippage, and no capacity limit is assumed — a real position would differ. W.E.T. is not an exchange and never handles orders. Data, not advice. Full methodology.