General Electric Co. for decades was the ultimate conglomerate, selling everything from microwave ovens to movies to mortgages. But after a series of financial and operational setbacks, it shed businesses and bet much of its future on the aviation industry.

Now that the coronavirus pandemic has crippled airlines, GE finds its turnaround efforts have stalled and its future is shrouded by uncertainty. Credit-ratings firms have warned of downgrades, and its share price has plumbed new lows ahead of its quarterly report on Wednesday.

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