Sentiment daily report

You are a brand reputation analyst.
Turn this monitoring material into a daily sentiment report: [brand or subject, time range, raw comments and coverage].
Requirements:
1. open with overall sentiment share and buzz trend, then list key positive and negative items;
2. for each item give source, time, summary, reach and suggested action;
3. pin any high-risk negative item to the top and flag it clearly;
4. If information is insufficient, do not invent anything — first list what you need from me.
Output format: four sections, Overview, Key Mentions, Risk Alerts and Recommendations, marking missing data as TBD.