Wall Street appears to be hitting its limit on AI, and financiers are starting to say the quiet part out loud: All of this AI spending doesn't look like it can pay off, at least not for everyone.

Why it matters: The gap between what it costs to build AI infrastructure and what companies are actually paying to use it is widening. Wall Street's anxiety is surging as the debt piling up to fund data centers and chips looks increasingly disconnected from economic reality.

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