They have been joined in the latest leg of the rally by cyclical stocks, albeit fitfully. Investors have become more willing to place bets on a sustained rebound in business activity, amid hopes the pandemic could be peaking in the US.
Yet a significant majority of S&P 500 members are still below their levels when the market last peaked on February 19; fewer than 40 per cent are above their level on that day, and the average company is down more than 7 per cent.
"Wall Street isn't a mirror of Main Street," said Brad Neuman, director of market strategy for Alger, a New York fund manager. "The stock market has a much smaller weighting to the areas of the economy that have been hurt the most, like malls, hotels and airlines."
The new market peak reflects a "record divergence between winners and losers" that has benefited big tech groups that dominate the digital economy in areas such as cloud computing and online shopping, Neuman added.
Big tech has benefited from the stay-at-home orders that have kept millions of people around the world stuck indoors. Apple, the largest company in the S&P 500, is up nearly 60 per cent this year and sits on the cusp of a US$2 trillion ($3t) market capitalisation. Last month it revealed record revenue for the June quarter as people purchased its devices to work from home.
"The mega-cap growth and tech companies have done incredibly well in the pandemic," said Meghan Shue, head of investment strategy for Wilmington Trust. "We think it is probably a bit too far too fast — there is a great deal of optimism priced into the market right now."
The rally has been helped along by trillions of dollars in government spending and support from the Federal Reserve, which in March cut interest rates to nearly zero and announced a vast bond-buying programme to prop up financial markets and help companies borrow money to weather the pandemic.
The subsequent rally in government bonds sent the yield on the 10-year Treasury to a record closing low earlier this month.
Falling yields on government debt have stoked the stock market rally in several ways, beyond just providing hope that the economy can recover quickly from the pandemic. They have pushed more investors to seek higher returns in riskier assets and made equities look less expensive relative to bonds.
Even after the rally to a new record, the earnings yield on US stocks — a measure of profit relative to share prices — is little higher compared with bond yields than it has been historically.
The current earnings yield on the S&P 500 was 3.8 per cent on Tuesday, 3.1 per cent higher than the 10-year Treasury yield.
"If we look at the price of stocks compared to earnings or sales it looks stretched," said Max Gokhman, head of asset allocation for Pacific Life Fund Advisors. "But if we look at it from a relative perspective, especially relative to fixed income, it doesn't look bad. It might even look attractive."
Written by: Richard Henderson and Brooke Fox
© Financial Times