Alphatec Holdings is trading at $8.29, up 10.98%, alongside a sharp U.S. market rally after midterm-election uncertainty eased. - Major indexes are higher as investors respond to expectations of political gridlock; healthcare shares are also supported by anticipated policy changes. - No new company-specific catalyst for the November 4 move surfaced. The late-October revenue outlook reduction and related investor investigations are prior developments, not a clear explanation for today’s rise.