There’s a difference between owning the market and owning the companies inside it, and most savers never notice the gap until it costs them money.For more than a year, the gap hasn’t mattered. The S&P 500 has climbed in a nearly straight line, printing record after record, and the laziest decision a saver could make, buying the index and forgetting about it, has also been the most profitable. By late May, the benchmark was trading near 7,520, up almost 28% from a year earlier, according to the Federal Reserve Bank of St. Louis.Underneath that number, the market has quietly become something narrower. A small cluster of AI names now does most of the heavy lifting, and software giants Microsoft (MSFT), Oracle (ORCL), and Palantir (PLTR) led the latest leg higher, according to Trading Economics.One of Wall Street’s most-followed strategists looked at all of it and refused to celebrate. Savita Subramanian, head of U.S. equity and quantitative strategy at Bank of America (BAC), used a May 28 appearance to double down on a cautious call she has carried for months. She likes stocks, she said. She just doesn’t like the index.”I like stocks, I just don’t like the index right now,” Subramanian told CNBC.
“I like stocks, I just don’t like the index right now,” says BofA Securities’s Savita SubramanianPhoto by Bloomberg on Getty Images
Why BofA won’t trust the S&P 500 record runSubramanian’s problem isn’t the economy. It’s what the index has turned into. The companies that now dominate the S&P 500 are the AI leaders investors have been buying on the promise of what comes next, not on what they earn today, and she expects that premium to deflate in 2026 as valuations reset rather than expand.The concentration is hard to overstate. The Magnificent 7 drove roughly 54% of the index’s price gain in the third quarter of 2025, according to First Trust, which means a few boardrooms in California now steer the direction of nearly every American’s retirement account.More Wall Street:JPMorgan resets S&P 500 price target for the rest of 2026Vanguard challenges the S&P 500 as a one-stop strategyGoldman Sachs resets Broadcom stock forecastBank of America laid out its bear case in detail earlier this year, as covered by TheStreet, flagging the index as overbought on 18 of the 20 valuation measures the firm tracks. Subramanian’s answer has been to push investors away from the crowded trade and toward cheaper, steadier corners of the market, favoring health care and real estate over technology and consumer staples over discretionary names.Multiple compression is a clinical phrase for a simple, painful event. It means the price of a stock can fall even while the company keeps growing, because investors decide that growth is worth less than they thought. That is the risk Subramanian sees hiding inside a record-high index.There’s a second worry underneath the valuation math. If AI delivers everything its backers promise, it starts replacing workers, and when paychecks disappear, so does the consumer spending that holds the economy up. Investors now have to “pick a side,” she said.When I line that argument up against the tape, it stops sounding like permanent gloom and starts sounding like a warning about who is actually holding the risk.Related: Goldman Sachs doubles down on S&P 500 message for 2026What the most bearish target on Wall Street now impliesHere is where the call gets strange. Bank of America’s year-end 2026 target for the S&P 500 is 7,100. When the firm set it in December, that was the most cautious number on Wall Street, and it still implied about 4% of upside, according to CNBC. The index has since blown past it.When I ran that target against where the index actually closed last week, the math flipped. A forecast built to look cautious now reads as a call for stocks to fall. The path of the number tells the story.Dec. 15, 2025: BofA set its 7,100 target, the Street’s most bearish, when the index sat near 6,827, according to CNBC.April 15, 2026: The S&P 500 closed above 7,000 for the first time, finishing at 7,022.95, according to TheStreet.May 27, 2026: The index closed near 7,520, up roughly 28% in a year, according to the Federal Reserve Bank of St. Louis.To reach 7,100 from there, the S&P 500 would have to fall about 6% by Dec. 31, based on my own math off the Fed’s data.The rest of the Street is leaning the other way. Fundstrat’s Tom Lee has the index at 7,700, treating investor anxiety as fuel for the rally, and Deutsche Bank’s Binky Chadha sees 8,000, according to CNBC. Subramanian is standing nearly alone, and the gap between her and her most bullish peers now runs past 10%.That distance matters because the two camps are not arguing about the economy. They are arguing about what you should pay for the same handful of companies, and one side thinks the price has stopped making sense.What a cautious S&P 500 call means for your 401(k)Strip away the strategist language, and the message lands close to home. If you hold an S&P 500 index fund in your 401(k), and tens of millions of Americans do, you no longer own a broad slice of the economy. You own a concentrated bet on a small group of AI companies, whether you meant to make it or not.Put a number on it. A worker with $100,000 in an S&P 500 fund now has well over $30,000 riding on a handful of AI-era giants, because that is roughly the share of the index they occupy. If those few stocks stumble, the rest of the basket cannot easily catch the fall.That is the quiet point inside Subramanian’s call. Her advice to own stocks rather than the index is really an argument to spread the risk you have unknowingly piled into a few tickers, and to lean toward sectors where the price already reflects lower expectations instead of perfect ones.None of this means the market falls tomorrow. The index can keep setting records for months and she can still be proven right, because being early is not the same as being wrong. The reckoning she is describing only arrives when the AI spending boom has to turn into real profits, and that test creeps closer with every earnings season.The number on your account statement and the health of the companies behind it have quietly become two different things. Working out which one you actually own is the cheapest edge a saver can find this year.Related: JPMorgan resets S&P 500 outlook with stunning target