The leaders met as a precursor to an EU summit scheduled for next week.
Investors also reacted to news Moody's Investors Services had downgraded the credit rating of 15 global banks. But that news had been long anticipated. Financial firms on the blue-chip Dow Jones industrial average held up well, considering. American Express Co. shares rose 0.53 percent, while Bank of America shares lost 0.13 percent. JPMorgan Chase & Co. shares gained 0.71 percent.
At the close on Wall Street, the DJIA, which lost 250 points Thursday, added 76.21 points or 0.53 percent to 12,640.78.
The Nasdaq composite index, off 71 points Thursday, gained back 33.33 points or 1.17 percent to 2,892.42.
The Standard and Poor's 500 gained 9.51 points or 0.72 percent to 1,335.02 after dropping 30 points Thursday.
On the New York Stock Exchange, 2,095 issues advanced and 950 declined on volume of more than 4.846 billion shares.
The benchmark 10-year treasury note fell 18/32 to yield 1.677 percent.
The euro rose to $1.257 from Thursday's $1.2541. Against the yen, the dollar rose to 80.12 yen from 80.29 yen.
In Tokyo, the Nikkei 225 lost 0.29 percent, 25.72 points, to 8,798.35.
In London, the FTSE 100 index lost 0.95 percent, 52.67 points, to 5,513.69.
Couple mistakenly served bag of cash at McDonald's drive-thru
Exploding whale video goes viral on Internet