Wall Street has closed slightly higher to mint new record highs for the S&P 500 and the Dow industrials, fuelled by Bank of America's better-than-expected profit and a major tech sector acquisition.
SoftBank's $US32 billion (NZ$45 billion) deal to buy British chip designer ARM Holdings lifted US chip stocks on Monday, and the technology sector led the way higher on the S&P 500.
The tech-heavy Nasdaq rose more than the S&P and the Dow.
Bank of America's earnings report continued the momentum for US banks, kicked off by JPMorgan last week. The bank's shares rose 3.3 percent to $US14.11, helping the S&P financial index gain 0.4 percent.
"The underlying catalyst is a breakout in economic optimism," said Jim Paulsen, chief investment strategist at Wells Capital Management in Minneapolis.
"What's really important is people are revising up their earnings numbers. You see more cyclical (sectors) taking over leadership and less of the bond-like stocks."
The Dow Jones industrial average rose 16.5 points, or 0.09 percent, to 18,533.05, for its seventh consecutive up day.
The S&P 500 gained 5.15 points, or 0.24 percent, to 2,166.89 and the Nasdaq Composite added 26.20 points, or 0.52 percent, to 5,055.78.
The year-on-year decline in earnings of S&P 500 components is now expected to slow to 4.5 percent in the second quarter, from 5 percent in the first, and more companies are expected to beat analysts' estimates, according to Thomson Reuters data.
Third-quarter earnings are then expected to turn positive, rising 1.5 percent, with fourth-quarter profit up a more robust 9.1 percent.
"There seems to be a growing consensus that this is the trough of earnings for the S&P 500," said Bucky Hellwig, senior vice president at BB&T Wealth Management in Birmingham, Alabama.
"If indeed it is, that can build some momentum on a fundamental basis going into the third and the fourth quarter."
The S&P 500 and Dow set new records last week for the first time in more than a year, shaking off global economic uncertainty including Britain's recent vote to leave the European Union.
The SoftBank deal sent ARM's US-listed shares surging 40.5 percent, while the semiconductor index rose 1.5 percent.
The materials sector gained 0.7 percent, boosted by a 2.9-percent rise in Monsanto shares. Monsanto is negotiating a confidentiality agreement with Bayer AG after Bayer raised its takeover offer to more than $US64 billion (NZ$90), Reuters reported.
Hasbro fell 6.6 percent to $US79.82 on concerns of slowing growth in the toy maker's sales targeted at boys, its biggest business. Rival Mattel dropped 1 percent.
After the market closed, Netflix shares tumbled 14.5 percent. The streaming video company's subscription additions in the second quarter fell short of analysts' expectations.
International Business Machines shares rose 2.5 percent after hours following results.
About 5.6 billion shares changed hands in US exchanges, well below the 7.7 billion daily average over the past 20 sessions.
NYSE advancing issues outnumbered decliners by a 1.72-to-1 ratio; on Nasdaq, a 1.25-to-1 ratio favoured advancers.
The S&P 500 posted 22 new 52-week highs and no new lows; the Nasdaq Composite recorded 110 new highs and 23 new lows.