According to @QCompounding, since 1987 Markel has returned more than 11,000% to shareholders, underscoring a multi-decade compounding record relevant to long-term equity allocators, source: @QCompounding on X, Sep 16, 2025. According to @QCompounding, the author characterizes Tom Gayner as one of the best investors and points readers to free access to Markel shareholder letters for primary research and due diligence, source: @QCompounding on X, Sep 16, 2025. According to @QCompounding, the post provides no additional metrics or crypto-market linkage but directs traders to study the shareholder letters as research inputs, source: @QCompounding on X, Sep 16, 2025.