The stock market meanwhile lost almost 5%, and government bonds weakened with the yield on the benchmark instrument due in 2026 rising by 26.5 basis points to 8.127%. Hopes that the coronavirus outbreak could be contained in China have vanished this week as infections spread across the globe. This is also what drove the Johannesburg Stock Exchange's Top-40 Index down 4.5% to 45,852 points - its lowest level since January last year - and the broader all-share index down the same amount to 51,038 points.