S&P 500 down for the second consecutive week, Boeing and Bank of America oversold, Marathon Petroleum overbought

The S&P 500 closed the week of September 16 down 0.1%, marking its second consecutive weekly decline. The Dow Jones Industrial Average fell 1.7% over the same period, reflecting the widespread volatility in equity markets. This correction comes after a rise in global bond yields, with the 10-year Treasury yield hitting its highest level in 19 years. The U.S. Federal Reserve raised its benchmark rate by 25 basis points on Wednesday, strengthening monetary pressures. (Source: CNBC)

Boeing oversold (RSI 25): Risk of imminent rebound

Boeing slid more than 5% after CEO Kelly Ortberg indicated that stabilizing production of the 737 Max was taking longer than expected, pushing its relative strength index (RSI) to 25, well below the 30 threshold that defines oversold territory. On a yearly basis, the stock is down approximately 9%, making it one of the most beaten-down stocks in the S&P 500. Analysts note that the very low RSI could signal excessive pessimism and set the stage for a technical rebound if fundamentals remain strong. (Source: CNBC)

From a technical perspective, an RSI below 30 often indicates that the price has fallen more rapidly than fundamentals justify, creating potential buying pressure from contrarian traders. Investors are also monitoring key support levels around $180, which if held, could trigger a quick rebound. Additionally, the recent rise in bond yields has increased pressure on industrial-exposed stocks like Boeing, but market correction could reverse this dynamic.

Finally, the macroeconomic context, marked by the Federal Reserve's monetary tightening, makes technical rebounds of oversold stocks particularly interesting for diversified portfolios. Fund managers who incorporate RSI signals into their sector rotation models might reallocate部分 of their positions to Boeing if the stock stabilizes at a support level. (Source: CNBC)

Bank of America oversold (RSI 28) after fee decline forecast

Bank of America saw its RSI drop to 28, placing it in oversold territory after a 8% decline in its stock price this week. CEO Brian Moynihan announced that investment banking fees for the third quarter are expected to fall by more than 10%, fueling concerns about future revenues. This announcement coincided with the rise in Treasury yields, which intensified the rotation of capital toward perceived safer assets.

The RSI below the 30 threshold suggests that the stock may have been overly penalized by short-term revenue prospects, opening the door to a potential rebound if quarterly results beat expectations. Analysts note that the bank has a strong deposit base and growing exposure to advisory services, which could support the stock in the medium term. (Source: CNBC)

Wynn Resorts, most oversold (RSI 17) and down 31% in 2026

Wynn Resorts shows the lowest RSI of the week at 17 after a decline of more than 5%, which pushed the stock to a new 52-week low just above $81. Since the beginning of the year, the stock has lost approximately 31% in 2026, reflecting persistent pressures on the gaming and hospitality sectors. The extremely low overbought level indicates that the market may have overreacted to macroeconomic uncertainties and high operating costs.

Investors following technical indicators see such a low RSI as an opportunity to buy, provided that the company's fundamentals, particularly the stabilization of luxury tourism, hold steady. The company has recently announced cost-cutting initiatives and a renovation program for its properties, which could support the stock if financial results improve. (Source: CNBC)

Marathon Petroleum overbought (RSI 87): up 7% and hitting all-time high

Marathon Petroleum reached an RSI of 87, placing it in overbought territory after a rise of more than 7% that pushed the stock to a record $428. This momentum was fueled by the rise in oil prices following drone attacks that threatened Saudi Arabia's East-West pipeline. Since the beginning of the year, the stock has climbed 161%, driven by the war in Iran, which has supported global energy prices.

An RSI above 70 generally signals overheating and predicts a short-term correction, especially in a context where oil prices could stabilize or decline. Analysts recommend monitoring support levels around $400, which if held, could limit potential losses. (Source: CNBC)

Implications for investors: interpreting RSI signals in a tightening monetary environment

The oversold and overbought signals provided by the RSI offer investors a valuable reference for identifying stocks that could rebound or correct quickly. In an environment where the Fed continues to raise rates, volatile stocks like Boeing, Bank of America, or Wynn Resorts are particularly sensitive to sentiment fluctuations. French investors can follow these movements via the S&P 500 index or the Amundi PE500 S&P 500 PEA ETF to benefit from diversified exposure.

In practice, combining RSI analysis with macroeconomic data - including bond yields and monetary policy decisions - helps fine-tune entry or exit timing. Oversold stocks could offer medium-term gain opportunities if fundamentals remain intact, while overbought stocks require heightened vigilance to avoid rapid losses in case of market reversal. (Source: CNBC)