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Early voting and mail ballot return data markets

In the weeks before a US election, early voting and mail ballot data flood social media. Charts show which counties are turning out and which party's registered voters have returned more ballots. Prices in election markets can move on these posts. Some contracts also ask directly about early vote totals. This SoftCta guide explains what the data can and cannot tell you.

What gets reported

State and county election offices publish counts of:

• Mail ballots requested and returned: often updated daily.
• In-person early votes: ballots cast at early voting sites.
• Breakdowns: by county, age, gender or party registration in states that register voters by party.

These are counts of ballots, not votes for candidates. Ballots are generally not tabulated until later, and results are not released before polls close.

Party registration is not vote choice

In states with party registration, trackers show how many returned ballots came from registered Democrats, Republicans and unaffiliated voters. Registration is a rough proxy at best. Registered voters cross over, unaffiliated voters lean either way, and some states do not register by party at all. Treating a registration split as a vote margin is a common error.

Method shifting

The partisan makeup of early voting changes from election to election. In 2020, Democratic voters used mail ballots far more than Republicans; in later cycles Republican campaigns encouraged early voting more actively. When one group moves more of its voting earlier, its early numbers rise without its total vote rising. Analysts call this cannibalising Election Day votes. Comparing early data with a previous election without adjusting for this shift leads to false conclusions.

Aggregators versus official sources

Academic and media trackers compile state reports into national totals. They are useful, but they update at different times, may estimate missing counties, and can define categories differently. A contract on early vote totals should name a source and a cut-off time. If it names a tracker, check how often it updates and whether it revises earlier figures.

Ballot deadlines and curing

States differ in when mail ballots must arrive. Some accept ballots postmarked by Election Day that arrive days later; others require receipt by the time polls close. Ballots with signature problems may be "cured" by voters within a set period. These rules affect how many returned ballots are eventually counted, which matters for turnout contracts and for how long counting takes; see our guide on certification and canvass.

Reading commentary

Early vote threads often build confident stories from partial numbers. Our guide on the narrative fallacy explains why compelling stories persuade more than they should. Early data are one input, alongside polls and fundamentals. On election night, the order in which counties report early and Election Day ballots also creates misleading swings, covered in our race calls guide and exit polls guide.

A careful reading habit

Compare like with like: same state, same day before the election, adjusted for changes in voting laws and method use. Note what share of the expected total vote is already in. Convert prices with the implied probability tool and verify live prices on the venue.

Primary sources SoftCta readers open

• State secretary of state and county election office reports
• State election codes on mail ballot deadlines and curing
• Academic early vote trackers and their methodology notes
• US Election Assistance Commission survey data

Reading the quote step by step

• Read the full title and rules, including the named settlement source and the time zone.
• Convert the Yes and No prices to implied probabilities and note the gap between them.
• Subtract fees and spread to see the effective price you would actually face.
• Write your own probability range and the evidence behind it, then compare.
• Check related and near-duplicate markets on other venues for consistency.

Closing SoftCta checklist

• Re-read the venue definition in your own words before reacting to a price.
• Convert prices with fee and spread awareness; verify live cents on the operator.
• Prefer primary settlement sources over secondary headlines and social summaries.
• Treat ChanceWire hubs, movers, and tools as orientation — not order entry.
• Confirm age, location, and product eligibility; SoftCta pages will not suggest location spoofing.
• If clarity is incomplete, watching is a complete SoftCta outcome — no pick-selling urgency required.

SoftCta habits

• Write your own probability range before checking the crowd price.
• Prefer dated primary sources over social summaries.
• Compare related markets when a single book looks extreme.
• Size curiosity with fees and depth in mind; substantial risk of loss.