### Initial Reaction (Correct)
- Weak jobs data → lower chance of Fed rate hikes → dovish → risk-on.
- Futures rallied right after the print, as expected.

### Why It Reversed (What Changed)
1. **Bond Market Reaction (The Real Driver)**  
   Even with weak jobs, the bond market sold off (yields rose). Traders interpreted the report as “economy still strong enough, inflation not coming down fast enough.” Higher yields = bad for stocks (especially growth/tech).

2. **“Bad News Is Bad News Again”**  
   After months of “bad news is good news” (weak data = rate cuts), the market flipped. Weak jobs now signals economic slowdown fears rather than just Fed relief. This is a classic regime shift.

3. **Semiconductor / Tech-Led Selling**  
   The SOX was already weak. Once the broader market turned, profit-taking accelerated in the high-beta names, dragging the Nasdaq and S&P lower.

4. **Technical & Sentiment Shift**  
   The initial futures rally failed at key resistance, triggering algorithmic selling and stop-losses.

### Bottom Line
The weak jobs number gave a brief dovish tailwind, but the market quickly pivoted to worrying about **economic slowdown + sticky inflation** (the worst of both worlds for stocks). Higher bond yields and continued rotation out of tech/semiconductors did the rest.

Thus, the initial positive reaction reversed into a selloff.