The vote, your own account, and the score.
Investment clubs voted, then pooled the money. Copy-trading kept your account, then handed the decision to one person. Concordia keeps the vote and your account, and measures who was right.
Deciding together is an old idea. It just kept breaking.
Investing with other people comes down to two questions: who decides, and whose account the trade lands in. Every earlier answer got one of them and gave up the other.
Clubs voted, then pooled the money.
Investment clubs got the decision right: a group arguing its way to one ballot. Then they pooled the money into a partnership, with a treasurer, a shared brokerage account and a tax form for every member. The paperwork killed them. The idea was fine.
37,129 clubs belonged to the NAIC at the 1998 peak. By 2007 it was 9,500.
NAIC/BetterInvesting counts via B. Harrington, 2008–09
166 clubs studied over 1991–97 earned 14.1% a year against 18.0% for the S&P 500. 60% trailed the market.
Barber & Odean, Financial Analysts Journal, 2000
Copy-trading kept your account, then dropped the vote.
Copy-trading fixed custody: the money stays in your own account. But one leader decides and you mirror them. Nothing to argue for, nothing to be right about, no vote to win. Autopilot shows the execution side scales. The decision still sits with one person.
Autopilot trades 103,000 accounts automatically.
SEC Form ADV, 31 December 2025
Then Robinhood opened the account itself.
Robinhood now gives an agent official access to an individual account. Before that, a group could decide together, or trade in its members' own accounts. Never both.
Robinhood opened agent access to individual accounts on 27 May 2026.
Robinhood Newsroom, May 2026
A vote.Your own account.Nobody holding the money.
Every predecessor had some of these. None had all three at once. That took Robinhood opening the account itself to an agent, in May 2026. Concordia adds the score: every pick measured against the S&P 500, and voting power that follows accuracy.
Who decides, and whose account.
Two questions sort every way of investing with other people: who decides, and whose account the trade lands in. Investment clubs let the group decide and pooled the account. Copy-trading kept your account and let one person decide. Concordia sits in the corner neither reached: the group decides, and the trade lands in your own account.
Who decides
- Traditional investment club
- The members, one vote each, usually at a meeting.
- Copy-trading app
- One leader you chose to follow.
- Concordia
- The members, by weighted ballot. One ballot per cycle on S&P 500 names.
Whose account
- Traditional investment club
- The club's. One shared brokerage account.
- Copy-trading app
- Your own. It mirrors the leader's trades.
- Concordia
- Your own Robinhood account. The winning basket executes there automatically.
Who holds the money
- Traditional investment club
- The club does, jointly, as a partnership.
- Copy-trading app
- You do. It stays in your own account.
- Concordia
- You do. Concordia never holds, pools or transfers it.
Who gets more voting power
- Traditional investment club
- Nobody. One member, one vote.
- Copy-trading app
- The leader. Followers don't vote.
- Concordia
- The members who keep being right. Every pick is measured against the S&P 500, and voting power follows accuracy.
The difference is structural, not a performance claim. Concordia is a private club, not an adviser or a broker: it does not manage money and does not recommend anything.
Invest together, in your own account.
One club, one ballot per cycle, and the most accurate members gain voting power. With a code: connect your own Robinhood account, set how much of it the club may use, and vote. No code? Leave an email — invites go out in small rounds.
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An address only. Membership is never confirmed or denied here.