Declining activity from Texas to North Dakota won’t be as harmful to the industry as some have feared, the chairman and chief executive officer of Continental Resources Inc. said. OPEC’s refusal to curb output last week bodes well for U.S. producers that can outlast countries in the cartel, which depend on higher oil prices.

“Will this industry slow down? Certainly,” Hamm said Monday in a telephone interview. “Nobody’s going to go out there and drill areas, exploration areas and other areas, at a loss. They’ll pull back and won’t drill it until the price recovers. That’s the way it ought to be.”

Investors have been spooked as oil has declined to a five- year low, after prices above $100 a barrel helped spark a boom in output from U.S. shale formations. The value of Hamm’s wealth, which is largely tied to the fate of Oklahoma City-based Continental, has fallen by more than $12 billion in three months, according to the Bloomberg Billionaires Index.

Hamm, who helped discover the potential of North Dakota’s Bakken formation, predicted a swift recovery in oil prices, which have declined more than 36 percent since June as Saudi Arabia and its allies in the Organization of Petroleum Exporting Countries declined to reduce production last week.

The company said last month it’s sold nearly all its hedges through 2016, in a bet on a recovery in prices. West Texas Intermediate, the U.S. benchmark, fell below $65 a barrel Monday before settling up 4.3 percent at $69 on the New York futures market.

Price ’Rhetoric’

Drillers from Texas to North Dakota are pumping the most in three decades, with many betting they can outlast Venezuela, Iran and other nations that need higher oil prices to fund government budgets.

The price drop has come about more because of “rhetoric” from Saudi Arabia than fundamentals of supply and demand in the market, Hamm said. While prices are low, shale producers have the upper hand, he said.

“We can adjust quickly and do it down the road,” he said. “It’s a lot easier to adjust companies than it is for countries to adjust. When you’ve got people starving or social policies within countries that people are used to, it’s hard to adjust those.”

‘Calm Down’

Continental declined 1.9 percent to $40.20 in New York, down 50 percent from its August high. An index of oil and gas producers on the Standard & Poor’s 500 Index has fallen 28 percent since June 20, when U.S. crude closed at a 2014 high of $107.26 a barrel.

Hamm has said in the past that his company can turn a profit at prices of $50 a barrel. Continental plans to boost output by as much as 29 percent next year, while cutting spending, according to a Nov. 6 company presentation.

In the most profitable area of the Bakken, producers can turn a profit on average with oil prices above $65.03 a barrel, according to Bloomberg New Energy Finance. Prices may fall to $50 a barrel by early next year, according to Wolfe Research LLC.

“This is a bump in the road, a correction, an adjustment that we’re going through right now,” Hamm said. People “need to calm down, take the long view and there’s certainly no need to panic at this point or any point.”