Bullish Case: The $123 all-cash onsemi agreement converts SYNA into a merger-arb convergence trade: HSR clearance is secured, financing is committed with no financing condition, and the FTC already cleared the deal. With shares at $117.86, a ~4.4% spread remains to the fixed cash price, implying positive carry as milestones advance toward a mid-2027 close. Helium's PDF shows its densest likelihood mass at 115–120 with a right shoulder at 120–125, and call volume runs 85% above puts, consistent with drift toward $123.

Bearish Case: The spread exists because deal completion is not certain: shareholder approval, foreign-investment and remaining international antitrust approvals are outstanding, and an unnamed third-party bidder triggered the renegotiation—evidence of competing valuation pressure that could resurface. Helium's own forecast is -0.67% with -0.2 realized correlation (no demonstrated edge), the term structure is backwardated, and deep-OTM put IV (60–208%) implies persistent downside convexity. Any termination, regulatory snag, or onsemi walk-away gapes SYNA toward its standalone $95–105 range.

Potential Outcomes:

1. ~55%: Deal progresses (shareholder vote passes, approvals land) → price converges $120–123 by close, IV compresses; falsified if 115–120 call IV lifts without price gain.
2. ~20%: Regulatory/foreign-investment delay or vote friction → spread widens, drift to $108–115; falsified if downside put IV stays flat.
3. ~12%: Deal breaks (termination, onsemi retreat) → gap to $90–100 standalone; falsified if left-tail put IV stays muted.
4. ~8%: Third-party rival bid re-emerges above $123 → pop to $126+; falsified if 130+ call IV stays near 10–20%.
5. ~5%: Broad semis/macro risk-off drags all outcomes lower (SPY surface shows steep downside wing); SYNA falls ~10% even with deal intact.

October 31, 2026