NB Bancorp's 15min chart shows Bollinger Bands expanding downward, bearish Marubozu pattern.

According to the 15-minute chart for NB Bancorp, the Bollinger Bands are currently expanding downward, indicating a bearish trend driven by sellers. The recent Bearish Marubozu pattern observed on March 27, 2023, at 15:45 also supports this notion, suggesting that sellers are in control of the market and bearish momentum is likely to persist.