Stocks were mixed on Monday as the S&P 500 and Dow Jones Industrial Average wrapped up their best August performances since the 1980s.
The 30-stock average plunged 223.82 points to close Monday at 28,430.05.
The S&P 500 lost 7.7 points from Friday's all-time high to 3,500.31.
The NASDAQ Composite advanced 79.82 points to 11,775.46.
The S&P 500 is up 7.6% month to date, putting the broader-market index on track for its biggest August gain since 1984. The Dow has rallied more than 8% this month and is also headed for its best August in 36 years.
Declines in bank stocks pressured both the Dow and S&P 500. JPMorgan Chase, Citigroup, Bank of America and Wells Fargo were all down more than 2%, following Treasury yields lower. Yields fell after Federal Reserve Vice Chairman Richard Clarida said rates won't go up just because unemployment goes down.
This month's gains have pushed the S&P 500 to record levels, officially confirming a new bull market has started.
Meanwhile, the NASDAQ got a lift after two big stock splits took effect Monday. Apple shares gained 3.4% as a four-for-one split took effect. Tesla shares added 12.6% following its five-for-one split.
The August rally built on the market's sharp rebound off the March 23 intraday lows. Since then, the Dow has hurtled 55.7% and the S&P 500 is up 59.4%.
In an apparent long-term bet on the global economy, Warren Buffett announced Sunday that his Berkshire Hathaway conglomerate had acquired stakes of more than 5% in Japan's five-leading trading companies.
Those companies are Itochu Corp., Marubeni Corp., Mitsubishi Corp., Mitsui & Co., and Sumitomo Corp. The five businesses import everything from metals to food into Japan and provide services to manufacturers.
The Dow kicked off the week with three new constituents and with Apple having a much smaller influence on the 30-stock average.
At Monday's open, Salesforce, Amgen and Honeywell were included in the Dow, replacing longtime component Exxon Mobil, Pfizer and Raytheon Technologies.
Prices for the 10-Year Treasury were higher, dropping yields to 0.71% from Friday's 0.72%. Treasury prices and yields move in opposite directions.
Oil prices dipped 16 cents to $42.81 U.S. a barrel.
Gold prices eked up 30 cents to $1,975.20 U.S. an ounce.