* Futures down: Dow 0.14%, S&P 500 0.11%, Nasdaq 0.12%

* Trump cancels US envoys' visit to Pakistan

* Qualcomm ( QCOM ) climbs 9% on report of OpenAI tie-up

(Updates before market open)

By Niket Nishant and Utkarsh Hathi

April 27 (Reuters) - Wall Street's main indexes were set

for a muted open on Monday as peace talks between the U.S. and

Iran stalled, while investors awaited a flood of earnings as

well as commentary from the Federal Reserve meeting this week.

U.S. President Donald Trump canceled a visit by two U.S.

envoys to Pakistan, dealing a ‌new blow to peace prospects. With

an agreement to end the war still out of reach, investors have

drawn reassurance from solid earnings so far.

Of the 139 companies in the S&P 500 that reported results as

of Friday, 81.3% surpassed earnings expectations, compared with

the prior four-quarter average of 78.1%, according to data from

LSEG.

However, some analysts have questioned how dependable the

results are as a guide to future performance, since they reflect

only one month of disruption linked to the Middle East war.

At 8:42 a.m. ET, Dow E-minis were down 67 points,

or 0.14%, S&P 500 E-minis were down 8 points, or 0.11%,

and Nasdaq 100 E-minis were down 33.75 points, or 0.12%.

"While earnings are now demanding a lot of focus from

investors, certainly the constant drumbeat in the background is

the Iranian conflict," said Peter Andersen, founder at Andersen

Capital Management.

"There doesn't seem to be any progress on a resolution. Once

the earnings period is over, investors probably will start to

refocus on the Iranian conflict and what it means in the

long-term impact for the equity markets."

The trajectory of oil prices remains the biggest unknown, as

the crucial Strait of Hormuz is still closed. Brent crude

futures were trading about 1% higher on Monday and are

46.7% above pre-war levels.

Investors will also hear from Federal Reserve policymakers,

who will gather in Washington this week in what may be Jerome

Powell's last meeting as head of the U.S. central bank.

Republican Senator Thom Tillis said on Sunday he would allow

​the Senate confirmation of Fed chair nominee Kevin Warsh to go

forward, after the Department of Justice dropped an

investigation ‌into Powell that Tillis said was a threat to the

central bank's independence.

"With those obstacles now removed, the path appears clearer

for Warsh's confirmation ahead of the next policy meeting (in

June)," said Jefferies' chief U.S. economist Thomas Simons.

A Reuters poll of economists last week showed that the Fed

is expected to wait at least six months before cutting interest

rates this year.

In the premarket session, Qualcomm ( QCOM ) was up 9.1%

after an analyst said OpenAI was working with the chip designer

and Taiwan's MediaTek to develop smartphone

processors.

Domino's Pizza slipped 7.3% after the pizza chain

missed first-quarter sales estimates.

Nvidia ( NVDA ) rose nearly 1% after jumping 4.3% in the

previous session. The company has reclaimed a market valuation

above $5 trillion.

(Reporting by Niket Nishant and Utkarsh Hathi in Bengaluru;

Editing by Devika Syamnath)