Quiz · 5 questions
📅 The Market Owns the Date
A snapshot belongs to the market it describes, not to the machine that fetched it
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Quiz
01The daily loop runs at 07:11 Asia/Seoul. Why did stamping rows with the local date mislabel US readings?
02How does the code determine the session date a quote actually belongs to?
03Measured at one instant, a US ETF resolved to 2026-08-05 while a Tokyo-listed ETF resolved to 2026-08-06. What does that prove?
04Why did the mislabelled rows survive the fix that stopped producing them?
05What does 'append-only' have to mean once a row can be wrong?
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