Wall Street closed out its best week in three months Friday as investors drew encouragement from ongoing negotiations on Capitol Hill aimed at delivering more aid to the ailing U.S. economy.

The S&P 500 rose 0.9%, its third straight gain. The benchmark index ended the week with a 3.8% gain, its strongest rally since early July.

Much of this week’s focus has been on Washington, where President Donald Trump sent markets on a sudden skid Tuesday after he halted negotiations on a support package for the economy until after the election. He appeared to change his mind a few hours later, however. On Friday, Trump was cheerleading the prospect of a deal, declaring on Twitter that talks on a new aid package are “moving along. Go Big!”

“The fact that Trump reversed course, I think, has given people optimism again,” said Randy Frederick, vice president of trading & derivatives at Charles Schwab.

The market’s solid finish follows a weekslong run of mostly shaky trading over worries that Congress and the White House won’t deliver more support for the economy as it reels from the impact of the pandemic and concerns that stock prices simply got too high during the summer.

The S&P 500 rose 30.31 points to 3,477.14. The Dow Jones Industrial Average gained 161.39 points, or 0.6%, to 28,586.90. The gain nudged the Dow into positive territory for the year. The Nasdaq composite climbed 158.96 points, or 1.4%, to 11,579.94.

Small-company stocks added to their solid gains this week. The Russell 2000 index picked up 9 points, or 0.6%, to 1,637.55. The index jumped 6.4% this week.

Investors have been clamoring for more federal aid since the expiration of extra benefits for laid-off workers and other stimulus for the economy that Congress approved earlier this year. Economists say the outlook is grim without such support, and the chair of the Federal Reserve has said repeatedly it will likely be necessary.

Still, the prospects for a new deal on more aid have been shaky, especially this week.

Trump said that House Speaker Nancy Pelosi was negotiating in bad faith when he called off the talks Tuesday. But within a couple of hours, he appeared to backtrack. He said that he would back more limited programs that would send $1,200 payments to Americans and support the airline industry and small businesses specifically.

On Friday the White house increased its offer to $1.8 trillion, up from $1.6 trillion, according to a Republican aide familiar with the plan. Pelosi’s most recent public proposal was about $2.2 trillion, though that included a business tax increase that Republicans won’t go for.

Pelosi and Treasury Secretary Steven Mnuchin spoke on the phone for 30 minutes Friday, but nothing concrete appeared to immediately emerge from the discussion. Senate Majority Leader Mitch McConnell said he doubts a deal will get done before the election.

Frederick said the uncertainty over another stimulus package remains a “substantial risk” to the market.