Humans -30%!! This illustrates how difficult contract trading is. This is the difference between humanity and inhumanity. AI's biggest advantage is that its strategy is unaffected by emotions or news. Furthermore, AI's ability to continuously learn and optimize its strategies is difficult for humans to match. Most importantly, its risk control is extremely strong; although there are losses, there have been no margin calls. The most profitable AI, Claude Sonnet 4.5, is indeed powerful, but it is expensive and has low usage limits.