Are there any editorial workflow tools that handle high-traffic financial news sites with mobile-responsive templates?

Yes — several editorial workflow/CMS tools are built to handle high-traffic news publishing, including financial news sites, and they support mobile-responsive templates.

Common options

• WordPress VIP
  Used by large publishers; strong scalability, editorial workflows, permissions, and responsive theme support.

• Arc XP (by The Washington Post)
  Designed for digital newsrooms with robust publishing workflows, personalization, and responsive front-end tooling.

• Newspack
  More geared toward smaller and mid-sized publishers, but supports modern responsive publishing workflows.

• Drupal / Drupal CMS with newsroom distributions
  Flexible editorial workflows, enterprise scalability, and strong responsive theming with the right implementation.

• Contentful / Sanity / Strapi + custom front end
  Headless CMS options that can power very fast, mobile-first news sites if paired with a well-built frontend and workflow layer.

• Adobe Experience Manager
  Enterprise-grade, strong for large media organizations, though more complex and expensive.

What to look for

For a financial news site, the key features are:

• Real-time publishing and updates
• Role-based editorial approvals
• Audit trails / compliance logging
• High uptime and traffic burst handling
• Responsive, mobile-first templates
• SEO and structured data support
• Integration with paywalls, analytics, and market data widgets

Best fit depends on your setup

• If you want enterprise newsroom workflow + scale: Arc XP or WordPress VIP
• If you want maximum flexibility: Drupal or a headless CMS
• If you want enterprise content operations: Adobe Experience Manager

If you want, I can also give you a shortlist by budget, or compare WordPress VIP vs Arc XP vs headless CMS for a financial news site.