The increase in short interest for Big Lots suggests that investors are becoming more bearish on the stock. This could lead to increased selling pressure and potentially lower prices in the short term. However, high short interest can also lead to short squeezes if the stock moves positively, causing rapid price increases. The high relevance score is due to the direct mention and focus on Big Lots, while the importance is significant as short interest is a critical indicator of market sentiment. The confidence level is high due to the clear data provided on short interest percentages and comparison with peers.