Stocks on Wall Street wobbled to a mixed finish Monday as oil prices dipped after the U.S. and Iran suspended their strikes as work resumed to restart discussions to end the war.

The S&P 500 was up less than 0.1% after spending most of the day bouncing between minor gains and losses. The benchmark index was coming off two straight weekly losses. The Dow Jones Industrial Average increased 0.5 percent and the Nasdaq composite lost 0.2 percent for its fourth straight loss.

The three main stock indexes are on track to post monthly declines. That would be a second straight monthly decline for the S&P 500 and Nasdaq.

Oil prices turned lower after a week of gains driven by a significant rise in conflict between the U.S. and Iran that raised fears about global oil supplies. Brent crude, the worldwide benchmark, lost 6.3% to end at $85.87 a barrel for October delivery. Last week prices shot up over $100 a barrel before dropping again.

U.S. crude oil for September delivery dropped 7.5% to settle at $82.61 a barrel.

The confrontation between the U.S. and Iran has severely limited, and at times stopped, transportation through the critical Strait of Hormuz. That has sent ripples through the global economy. Gasoline prices have soared and transportation costs are going up for most commodities, and firms usually pass those expenses along to households.

Trading was shaky, with a mix of large firms leading to gains and losses, with technology companies responsible for much of the market swings.

Nvidia sank 5% while Micron Technology lost 2.3%. Microsoft shares jumped 1.9%, while Apple added 1.2%. They are all among the most valuable corporations in the world, and those lofty values give them considerable sway over the broader market’s path.

Most businesses in the S&P 500 rose, but the mix of gains and losses among a range of those companies had more influence in pushing and pulling the market. Communications stocks were among Monday’s winners. Shares of Alphabet, the parent company of Google, increased 2.1%. Charter Communications shares jumped 6.7% while Comcast shares climbed 2.3%.

Credit card issuers and payment processors also profited. American Express was up 2.8%, Capital One Financial added 2.1%, Visa jumped 1.9% and rival Mastercard was up 2.2%. Shares of Chinese memory chip company CXMT jumped on their Shanghai debut. The corporation catapulted to become the most expensive listed company in China, with a projected market value of 3.3 trillion yuan (almost $490 billion).

The S&P 500 was up 1.20 points at 7,413.18. The Dow added 262.83 points, to 52,210.08, while the Nasdaq fell 43.74 points, to 24,932.08.

It’s a busy week ahead on Wall Street with a number of potentially mark-moving developments on the economy and company profits. Consumer confidence reports are coming Tuesday and inflation Thursday.

“This is a week with more than its share of potential surprises, good and bad,” said Chris Larkin, managing director, trading and investing, with E-Trade from Morgan Stanley.

The primary focus will be the Federal Reserve with an announcement on its interest rate policy Wednesday. The central bank has had to deal with the effects of growing inflation, as the U.S. war with Iran continues. It also faces a fresh round of U.S.-imposed tariffs worldwide that might add to its inflation troubles.

Wall Street gives a roughly one-in-three probability the Fed will raise rates at its meeting this week. Raising rates makes borrowing more expensive, which can help cool inflation and hinder economic growth.

The central bank has held rates stable throughout 2023 as it analyzes the course of inflation and its impact on the economy, but Wall Street is wagering on at least one rate hike before the year ends. Inflation is still too high, which is hurting people, and fuel prices have been a particular strain on budgets and expenditure. Higher gasoline prices are pinching household budgets and that may mean cutting back on other things such as clothes and travel.

Investors are looking to the next round of corporate earnings for signs of consumer strain and if the yearlong rally in stock prices across Wall Street is supported by profits and profit-growth predictions.

Investors will also be digesting a strong wave of corporate earnings this week. Many of those studies could shed further light on the health of different parts of the economy. Paint and coatings producer Sherwin-Williams, airplane builder Boeing and payments processor Visa are scheduled to disclose their latest results on Tuesday.

Starbucks and Chipotle are reporting earnings Wednesday. Technology companies have come under particular scrutiny since their huge profits during the year have fueled Wall Street’s record run. Microsoft is due to report earnings on Wednesday. Apple and Amazon (which has a booming cloud services sector and is AI-focused) release earnings Thursday.