Frontline may make a higher offer after DHT Holdings rejected its takeover bid, but some analysts say the John Fredriksen-led company may not be willing sweeten the pot enough to win over its smaller rival.

Others, however, are more optimistic that a deal might go through.

Tanker prices in the sale-and-purchase market may place a limit on how high an offer makes sense for the the New York and Oslo-listed Frontline, because the company's own net asset value will make DHT's shareholders wary of dilution of their share in any tanker market upside.

But