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I noticed when viewing a question here that a hot network question from Money.SE was formatted strangely. Presumably because it's interpreting the title as math markup.
Screenshot from this site:
Screenshot from another site:
This is a known issue. As a workaround, you can install SOUP (Stack Overflow Unofficial Patch), which will prevent MathJax rendering in HNQ titles unless the site is known to have MathJax enabled.