The bottom line

■ The oldest and largest power generation and transmission cooperative in Texas, Brazos Electric, filed for bankruptcy this week after racking up an estimated $2.1 billion in charges over seven days of deep winter freeze last month. Cooperative members paid $774 million for power for all of 2020.

Bloomberg.com

■ There were 4,814 public companies listed on major U.S. exchanges in the fourth quarter, an increase of 197 from the year before. That reverses a steady decline in the number of listed companies, which had fallen from 8,500 in 1997 to 4,500 in 2017.

The Wall Street Journal

■ Amazon Air, the retailer’s cargo fleet, now makes an average of 140 flights per day and is expected to have 85 planes in service by the end of 2022. That’s still far fewer than FedEx (679 planes) and UPS (572), but Amazon Air has already almost doubled in size since last May.

CNBC.com

■ Target’s sales growth of $15.5 billion last year was larger than its total sales growth over the past 11 years combined. The retailer’s overall sales: $93.6 billion in 2020.

CNN.com

■ The 100 richest Americans would hand over more than $78 billion in a year under a wealth tax proposed this week by Sen. Elizabeth Warren (D.-Mass.) and other lawmakers. Dubbed the UltraMillionaire Tax Act, the bill would require households with more than $50 million to pay a 2 percent annual tax, with an extra 1 percent surtax on fortunes over $1 billion.

Bloomberg.com

■ Warren Buffett revealed his company, Berkshire Hathaway, bought back $9 billion of its own stock in the fourth quarter, bringing its total of share repurchases in 2020 to $24.7 billion.

Barron’s