1. Yield curve inversion: This occurs when the yield on long-term bonds falls below that of short-term bonds.

2. High unemployment rates: A sustained rise in unemployment rates is often a sign of a recession.

3. Consumer Confidence Index: When consumers are less confident about the economy, they tend to spend less, leading to a slowdown in economic activity.

4. Gross Domestic Product (GDP) growth rate: A consistent decline in GDP growth rate may signal an upcoming recession.

5. Manufacturing index: A decline in the manufacturing sector may indicate an economic slowdown.

6. Corporate profits: A decline in corporate profits can signal a decrease in economic activity.

7. Interest rate hikes: When the Federal Reserve raises interest rates, it can slow the economy and trigger a recession.

8. Housing market decline: A collapse of the housing market can have a ripple effect throughout the economy.

9. Business investment: A decrease in business investment can result in a slowdown in economic activity.

10. Consumer spending: When consumers reduce spending, it can lead to a slowdown in economic growth.