The Dow Jones Industrial Average fell 0.3%, or around 120 points, pulled down by sinking Walmart shares. The 30-stock index was off its lows but remained below the 45,000 level. The S&P 500 gave up 0.3% and tested its 21-day exponential moving average. The S&P 500 is on pace for five straight losing sessions.

Berkshire Hathaway and the Dow Jones Industrial Average have some overlap on stocks that are held in both investment portfolios.

Stock futures are pointing to a slightly lower open for major indexes on Wednesday as investors respond to a slew of earnings reports from retailers and brace for a big speech later in the week by Federal Reserve Chair Jerome Powell.

The Dow Jones index closed slightly in positive territory. Nvidia, Palantir both sank Tuesday. A manufacturing services name sold off.