The stock market experienced an unusual day on Thursday. This could potentially be positive.

• While the Russell 2000 gained more than 3%, the S&P 500 and Nasdaq Composite were weighed down by struggles with Big Tech stocks.
• Large tech stocks have been driving much of the recent rally, causing investment experts to worry about a limited number of market leaders.
• The consumer price index for June showed a decline in headline inflation, which led to the split trading.

On Thursday, Wall Street experienced a significant change in market trends, with the positions of winning and losing stocks being reversed. This could potentially be the boost the rally needs to continue.

On Thursday, the small-cap index, which has been struggling all year, experienced a more than 3% increase. However, every stock in the "Magnificent 7" fell, with experiencing a more than 5% decline and dropping 2.3%. This decline dragged down both the and the overall market.

The bespoke investment group posted two statistics on social media site X to illustrate the rarity of that specific split.

• Since 1979, the Russell 2000 has risen more than 3% on only two days, with the S&P 500 declining on both occasions.
• The Russell 2000 outperformed the Nasdaq Composite by more than 5 percentage points in what appears to be the biggest daily gap on record. The only other time the gap came in above 5 percentage points was in November 2020, following Pfizer's positive results from a Covid-19 vaccine trial.

Although the major market averages and many individual 401k accounts may have decreased for the day, this unusual outcome could indicate a positive outlook for the market. The recent surge in stock prices has been primarily fueled by the performance of large tech companies, causing investment experts to express concerns about the market's concentration on a limited group of leaders.

Ed Yardeni of Yardeni Research stated on CNBC's "Closing Bell" that today is significant because investors are beginning to shift their investments from the Magnificent 7 to other parts of the market. He believes that this trend will not significantly impact the S&P 500's performance, but it will lead to more gains in the S&P 493 and small and mid-cap stocks.

The decline in headline inflation in the June report for the consumer price index and the subsequent increase in inflation over the past year boosted confidence that the Federal Reserve would cut interest rates in September. Fed Chair Jerome Powell stated in Congressional testimony that the central bank was aware of the potential negative impact of holding rates high on the economy.

"According to Sam Stovall, chief investment strategist at CFRA Research, investors are shifting their focus from large-cap tech stocks to mid- and small-cap stocks, as well as real estate, in anticipation of the Federal Reserve cutting interest rates. Stovall explained that investors had been waiting for confirmation that the Fed would begin cutting rates, and that this confirmation would not be in response to a recession."

Government bond prices were rising on Thursday as yields on U.S. Treasurys decreased across the board.

Ross Mayfield, an investment strategy analyst at Baird, stated on CNBC that the market has positive CPI despite a slightly dovish Powell. He explained that rates have decreased significantly, and there is a rotation trade. However, the concentration of the market in big tech can make this rotation trade appear negative on the surface. Mayfield believes that this is what is happening today.

Small cap stocks may face challenges in a slow growth or recessionary environment, as they are more economically sensitive and domestically-oriented than larger companies.

— CNBC's Sarah Min and Alex Harring contributed reporting