Is Mersana Therapeutics, Inc. technically bullish or bearish?

As of 8 September 2025, the technical trend for Mersana Therapeutics, Inc. has changed from bullish to mildly bullish. The MACD indicates a mildly bullish stance on both weekly and monthly time frames, while the RSI shows a bullish signal on the monthly but no signal on the weekly. However, the Bollinger Bands and moving averages present a bearish outlook on the daily, with the daily moving averages specifically indicating bearish momentum. The KST is mildly bullish on the weekly but bearish on the monthly, and the OBV is mildly bullish on the weekly with no trend on the monthly.
In terms of performance, the stock has significantly underperformed compared to the S&P 500 across all time frames, with a year-to-date return of -79.44% versus the S&P 500's 12.22%, and a one-year return of -86.13% compared to the S&P 500's 17.14%. Overall, the current technical stance is mildly bullish, but the significant underperformance against the benchmark raises caution.