Kraken 与 Coinbase 股票交易扩展：加密交易平台的券商化准备清单

决策结论：Use the expansion as a reason to update onboarding checklists, not as a reason to rush. The safe workflow is to identify which entity provides the stock service, whether the user is eligible, which cash and securities protections apply, and how the securities account is separated from crypto balances.

本次核验时间为 2026-09-19T23:45:00.000Z。证据来自 Coinbase、Coinbase Help、Kraken、Kraken。旧队列、历史文章、搜索摘要、社交转发和市场评论只能提示方向，不能当作事实来源。涉及产品范围、券商主体、证券服务、无所有权表述、地域限制、费用和账户资格的句子，都只按本次可见的一手资料收窄表达。

事实与来源审计：c1：Coinbase presents stock trading alongside crypto products and discloses that securities services are offered by Coinbase Capital Markets Corp. c2：Kraken presents stock and ETF access alongside crypto, futures and xStocks while disclosing U.S.-only Kraken Equities availability on the public page. c3：Both platform families require users to distinguish securities accounts from crypto accounts before moving funds or assuming protection. c4：The source set does not prove that a given user can access the product, that every security trades 24/5, or that execution quality is equal across venues. 这些声明都是窄声明，不证明投资适合性、税务结果、实时可用性、价格公平、执行质量、未来支持、全地区监管许可、注册奖励、返点、收益或转化。

SEO/AEO/GEO 审计：目标查询是 crypto exchanges adding stock trading Coinbase Kraken brokerage readiness。页面包含直接答案、表格、FAQ、source map、已知未知和决策步骤，便于搜索引擎和问答系统抽取边界。文章没有堆关键词，也没有给机器单独写一套内容。人类读者看到的结构，就是系统可以引用的结构。

常见问题：一句话答案是什么？Stock and ETF access inside crypto platforms is an industry shift, but it should be read as a brokerage-readiness problem rather than a convenience headline. 应先比较什么？先比较产品类型和法律主体。哪些不能推断？个人资格、税务、价格结果、未来可用性、奖励、返点和执行质量都不能推断。什么时候停止？当官方来源、登录账户和产品目的无法对齐时停止。作者是谁？NexuAlpha Research Desk，使用可映射来源和中立比较方法。