The Dow Jones Industrial Average managed to stretch its winning streak to six-straight sessions on Monday, defying the impact of spiking Treasury yields. However, Berkshire Hathaway faced a decline after its quarterly report revealed that Warren Buffett has reduced share buybacks. The day also witnessed Apple and Nvidia leading the charge in a rally among the Magnificent Seven stocks, while Tesla lagged behind.

The surge in Treasury yields posed a challenge to the stock market gains seen last week. Federal Reserve Gov. Lisa Cook issued a warning about the potential market stress caused by nonbank financial institutions (NBFIs) as financial conditions tighten. Cook expressed her hope that current interest rates would be restrictive enough to meet the 2% inflation target. However, she emphasized the need for vigilance.

Despite these challenges, the tech-heavy Nasdaq managed to post a 0.3% gain, marking its best run since January with seven consecutive sessions of growth. Constellation Energy led the way with a 6.5% increase after the company raised its earnings outlook. The S&P 500 also saw a modest 0.2% lift, maintaining its upward momentum for six straight sessions. Covid vaccine stock Moderna, however, experienced a 7% drop, making it one of the worst laggards of the day.

In terms of sectors, health, technology, and consumer staples performed well, while real estate and energy suffered losses. The small-cap stocks, represented by the Russell 2000, faced significant selling pressure, plunging by 1.3%. Growth stocks also experienced a decline, but managed to recover from their lows by the end of the session, resulting in a marginal dip of 0.1% for the Innovator IBD 50 ETF.

The Dow Jones Industrial Average closed the day with a 0.1% gain, driven by the positive performances of Apple stock and Amgen, which rose by 1.5% and 1.1% respectively. On the other hand, Walt Disney faced a 1.2% decline despite the announcement of Hugh Johnston, the longtime CFO of PepsiCo, as the company's new CFO. Walgreen Boots Alliance and Goldman Sachs were the poorest performers on the Dow.

Berkshire Hathaway's quarterly report revealed a 41% increase in operating profit to $10.8 billion, largely driven by Geico. However, the company also reported a painful investment loss of $24.1 billion. Notably, Warren Buffett is accumulating a significant cash reserve, with $157.24 billion in cash, up from $147.4 billion in the previous quarter. The company has been investing in short-term Treasury bills and has reduced its equity holdings, while also decreasing its share buybacks.

In the world of technology stocks, Nvidia and Apple outperformed the other Magnificent Seven companies, with gains of 1.7% and 1.5% respectively. Microsoft also had a solid session, rising by 1.1%, and Amazon recorded a more modest gain of 0.8%. Google parent Alphabet and Meta Platforms also experienced positive movements. However, Tesla lagged behind, with a 0.3% dip, just below its 200-day moving average.

Outside of the Dow Jones, DraftKings showcased bullish signals by ending the session in a buy zone above a consolidation entry of 34.49. Dell Technologies also performed well, with its relative strength line reaching new heights as it cleared a double-bottom entry. Similarly, Consolidated Water tested a flat-base buy point and finished just above the entry.

Overall, the stock market faced challenges from the spike in Treasury yields, but managed to maintain its winning streak. While Berkshire Hathaway scaled back on share buybacks, a number of stocks attempted breakouts, providing some optimism for investors. The coming days will demonstrate how the market responds to evolving economic conditions and the actions of key players.