The second-quarter earnings season for US stocks is now in full swing, with major American financial institutions, led by JPMorgan Chase, set to report their results in a concentrated wave.

Aggregated data indicates that, fueled by robust consumer spending, expanding loan portfolios, and a revival in initial public offerings (IPOs) driven by the artificial intelligence (AI) frenzy, the combined net profits of the six largest US banks are projected to show significant year-over-year growth for Q2, with some metrics potentially reaching record highs.

Nevertheless, geopolitical conflicts, persistently high inflation pressures, and market concerns over an AI valuation bubble have led to diverging views among Wall Street investors regarding the sustainability of the banking sector's future growth momentum.

According to the scheduled calendar, JPMorgan Chase, Bank of America, Wells Fargo, Citigroup, and Goldman Sachs are slated to release their earnings collectively before the market opens on Tuesday, with Morgan Stanley following suit on Wednesday morning.

After successfully passing the Federal Reserve's annual stress test in late June, these major banks have announced new share buyback and dividend plans, propelling the share prices of Goldman Sachs, Morgan Stanley, and Citigroup to record highs, while Bank of America and JPMorgan Chase also touched all-time peaks earlier this week.

The total value of special retention stock awards for JPMorgan Chase CEO Jamie Dimon has ballooned over the past five years, now exceeding $280 million, serving as a symbolic snapshot of the current US banking recovery.

Analysts note that despite a strong performance from profit engines in the first quarter and lucrative investment banking fees in Q2, including an estimated $500 million windfall for participating banks from historic IPOs like SpaceX, the market generally harbors a "fear of heights" regarding the subsequent trajectory of major bank stocks.

In a research note to clients, UBS analyst Erica Najarian acknowledged market skepticism about whether the banking sector has already peaked in this cycle.

HSBC analyst Saul Martinez also emphasized that while the underlying macroeconomic backdrop for banks is favorable and exposures to private credit funds have not yet triggered cracks in credit markets, current market expectations are already elevated, making it difficult for this quarter's earnings to materially and significantly raise investors' long-term expectations once again.

Currently, the core drivers supporting the US financial sector's upward trajectory stem primarily from robust consumer spending and structural tailwinds in capital markets.

The latest report from the Bank of America Institute shows that US card spending in June surged 6.3% year-over-year, marking the fastest growth rate in over four years, with discretionary spending taking the lead and wage growth among lower-income groups showing some resilience.

Bank of America CEO Brian Moynihan has previously stated that healthy consumer spending indicates the underlying US economy remains sound.

Furthermore, with AI unicorns like OpenAI and Anthropic planning trillion-dollar-level public listings by late this year or early next, Wells Fargo analyst Mike Mayo believes Wall Street is entering a multi-year "capital markets supercycle" catalyzed by AI technology adoption.

However, most Wall Street observers caution investors to remain restrained.

Mayo warned that the current capital market boom "could end in a nanosecond."

Dimon, speaking at an industry conference, also publicly told investors that JPMorgan Chase is currently in a state of "over-earning," and while financial performance has met expectations so far this year, the future market direction remains highly uncertain given the complex global macroeconomic environment.