 Shares of Tivity Health Inc. TVTY, -1.10 rallied 1.6 in premarket trading Tuesday, after the fitness, nutrition and social connection company announced an agreement to be acquired by private equity firm Stone Point Capital in a deal valued at 2.0 billion. Under terms of the deal, Stone Point will pay 32.50 for each Tivity shares outstanding, which is 0.8 above Mondays closing price of 32.25, but represents a 20 premium to the 90-day volume-weighted average price VWAP ending April 4. 