Reuters, citing people familiar with the matter, reported that PayPal’s board of directors initially believes that Stripe and the private equity firm Advent International’s proposed acquisition bid of about $53 billion undervalues the company and faces issues such as financing certainty, antitrust review, and an overly long deal timeline; PayPal has not yet officially responded. The bid is equivalent to about $60.50 per share. People familiar with the matter said that Stripe and Advent are still the most serious potential buyers, and the two sides may continue negotiations and consider selling assets such as Braintree to ease regulatory pressure.