Dow Jones futures, S&P 500 futures, and Nasdaq futures will open Sunday evening.

Berkshire Hathaway reported strong earnings and cash growth.

Warren Buffett expects further increases in earnings and cash levels.

The stock market rally had a strong week, with the Nasdaq surpassing a key level.

Nvidia regained a key level and flashed an early buy signal.

Several companies, including Palantir Technologies and Datadog, have earnings on tap.

Berkshire Hathaway's operating earnings jumped 39% in the first quarter.