Market Volatility & The Trust Playbook: Navigating Fraud in Two-Sided Marketplaces

Market Volatility & The Trust Playbook: Navigating Fraud in Two-Sided Marketplaces

July 16, 2026 · 1h 7m · Episode 412

About this episode

In this episode, Karisse Hendrick interviews Mark Porteous about navigating fraud in two-sided marketplaces and the impact of market volatility on fraud behavior.

Welcome back to Fraudology. In this episode, I’m sitting down with Mark Porteous, a longtime leader in e-commerce fraud and trust who knows two-sided marketplaces from the inside out. Mark spent nine years at StockX, where he started in customer support before building the company’s fraud program from the ground up. And honestly, that is one of the best ways to learn marketplace fraud prevention because you see the customer complaints, the chargebacks, the seller issues, the account problems, and the policy gaps before anybody has officially decided they belong to a fraud team. We get into what makes online marketplace fraud so different from traditional e-commerce. In a standard retail transaction, the merchant controls the inventory, the pricing, and fulfillment. In a two-sided marketplace, the platform may be trusting one person to sell, another person to buy, and sometimes a third person to deliver the product. Every additional participant creates another identity question, another fraud vector, and another opportunity for marketplace scams or policy abuse. The deeper theme of this episode is market volatility fraud. Prices can change dramatically because of a sports result…

People in this episode

Host: Karisse Hendrick

Guest: Mark Porteous

Topics covered

Keywords

Mentioned in this episode

Organizations: StockX

More episodes of Fraudology Podcast with Karisse Hendrick

Explore listener stats, chart rankings, contacts and more on the Fraudology Podcast with Karisse Hendrick podcast page.