Trian Fund's Nelson Peltz told CNBC on Wednesday that Wall Street is "unnecessarily" talking itself into a negative environment during a time of prosperity.
"I hear much more negativity than I should be hearing," Peltz said on "Fast Money: Halftime Report." "Earnings have been pretty good, ... revenue is hard to get, but revenue's been hard to get for several years now."
After the donation, a Peltz spokeswoman declined to comment on the presidential race, but noted that Peltz also had given money to the Democratic National Committee this cycle.
Peltz also said the Federal Reserve should not raise interest rates.
"Who can afford more interest? There's not a country in the world that can afford more interest. We certainly don't need any more interest payments," he said.
"I don't know why the hell they're thinking about having an interest rate hike," he added. "I don't think we need a stronger dollar."
Peltz is CEO and founding partner of Trian Fund Management, a hedge fund that has $10 billion in assets under management.
When asked about General Electric, his largest investment, Peltz said it's been a "good performer" since exiting the credit business, and has the "best industrial assets on the planet." The industrial company is coming off its worst quarter in more than two years, posting a 5 percent drop in the period ending Sept. 30. GE reports earnings on Friday.
Regarding one of his former investments, Pepsi, Peltz said he considers his exit to be "a victory." He said the stock increased from about $60 to over $100 during the time he was "an engaged shareholder." He credited Chairwoman/CEO Indra Nooyi for taking $1 billion a year out of its costs for three years in a row. "The company is doing the right thing, and I give all the credit to Indra," he said.
In June, the chocolate maker rejected a takeover bid from Mondelez that would have made the combined company the candy industry's largest player, according to Euromonitor International, passing Mars Inc.
—CNBC's Kate Kelly and The Associated Press contributed to this report.