{
    "action": "final",
    "content": "**What it is:** This is a daily stock-price history for semiconductor-related companies, matching the \"Semiconductor Stocks and the AI Surge\" theme. It is observational market data. Nobody operates it, so there are no levers. It is aimed at questions like which semiconductor stocks have trended up since 2012, whether the AI-driven surge changed price levels or trading activity, and how volatility compares across companies.\n\n**What one row represents:** One stock on one trading day. Each row carries that day's `open`, `high`, `low`, `close` and `volume`, plus the `company_name`, `stock_name` (ticker), and `date`. The remaining columns (`_ingestion_timestamp`, `_batch_id`, `_source_file`, `_source_system`) are load metadata, not market data.\n\n**Scale and coverage (from the profiling query):**\n- 422,729 rows covering 152 companies and 152 tickers, so each company maps to one ticker.\n- Dates run from 2012-01-02 to 2025-08-04.\n- There are 0 duplicate (`stock_name`, `date`) key rows, which confirms the grain: the pair is unique.\n\n**Caveat:** The card estimated about 149 distinct companies, but the actual count is 152, so I'd use the 152 figure. I did not check how many trading days each company has. Companies that listed later than 2012 will have shorter histories, so comparisons across companies should account for that."
}