Onlinebrokerage Public has launched what it calls an "Agentic Brokerage," athree-part AI system that aims to let retail investors create custom stockindexes using plain-language commands and eventually manage their entireportfolios through automated agents.Thecompany, which beganits AI push in 2023, is positioning the platform as a tool to level theplaying field between institutional money managers with teams of analysts andindividual investors juggling day jobs. But whetherusers will trust AI agents to handle complex portfolio decisions remains anopen question.Retail Traders Get Public’sIndex Creation ToolsThecenterpiece of the rollout is “Generated Assets,” which went live today. Userstype in an investment idea, like "companies with high revenue growth butthin margins that could benefit from AI" or "top-performing stocksfrom QQQ and SPY with double exposure to AI firms,” and Public's system deployswhat it calls "evaluation agents" to scan thousands of stocks andbuild a custom index.Theplatform automatically backtests each index against the S&P 500 anddisplays historical returns and drawdowns. Users can refine their indexes withadditional prompts or invest immediately through Public's fractional shareengine.The companysays future versions will include automatic rebalancing to keep portfoliosaligned with the original investment thesis.“AI istransforming every industry, including investing,” Leif Abraham, Co-CEO ofPublic, said in this week's announcement. “At Public, we’ve built an AI-nativeexperience that reimagines what an investing platform can be.”AI is changing how we invest. Today, we're officially launching Generated Assets within Public and giving you a preview of what's to come. We call it the Agentic Brokerage. pic.twitter.com/UaZ1u98chX— Public (@public) November 17, 2025Publicclaims users have already created more than 2,500 Generated Assets in the pastmonth. By comparison, fewer than 4,000 traditional ETFs have launched since theformat was invented.For Public,this is another upgrade to its AI tools, followingthe launch in May of its benchmark index generator tracking the S&P 500.The tool analyzes company filings and public data to recommend stocks thatmatch traders’ profiles.Cash Sweeps and RiskManagement Coming in 2026The AIresearch component, already available on the platform, includes tools thatanswer questions about individual stocks, scan earnings calls, and surfacemarket insights. Public says the tools give retail investors access to analysisthat used to require institutional resources.The thirdpillar, portfolio action, won't arrive until early 2026. Public says users willeventually be able to give instructions like "trim 10% of my bank stocksand rotate into high-growth tech, but only if the Fed cuts rates," or"sweep any cash over $2,000 from checking into my high-yieldaccount." The system will also support algorithmic trading strategies suchas buying at the close and selling at the open.Whetherretail investors will feel comfortable handing over those decisions to AIagents is unclear. Automated portfolio management existsin the robo-advisor space, but letting an AIagent make conditional trades based on Federal Reserve policy or executedaily buy-sell strategies raises different questions about control and risk.Fractional Shares Powerthe Engine“PublicAdvisors,” the SEC-registered investment adviser behind the platform, providesadvisory services, while “Open to the Public Investing” handles brokerage. Bothcharge fees, and the company notes in disclosures that Generated Assets outputis "for general informational purposes only" and should not betreated as personalized investment advice.Backtestsdisplayed by the system are hypothetical and don't reflect actual returns.Public also cautions that features and functionality described for the AgenticBrokerage may change before launch.Theplatform builds on Public'sexisting fractional share technology, which lets users buy portions ofstocks and ETFs. That engine makes it possible to assemble and rebalance customindexes without requiring users to buy whole shares of dozens or hundreds ofcompanies.This article was written by Damian Chmiel at www.financemagnates.com.