Many studies show that women tend to  invest more conservatively than men. In times of wild market swings, their approach can pay off. Since the Feb. 28 start of the  war with Iran , the major stock indexes have zigzagged, dropping before rebounding to reach all-time highs  last week. Amid such volatility , women are more likely to adopt a long-term, buy-and-hold investing strategy compared to their male counterparts, research shows . When it comes to investing, women are generally thought of as more risk-averse than men, said Mary Ellen Iskenderian, president and CEO of Women's World Banking. However, they are often "risk-appropriate," she said. "Ideas like risk-averse have become very gendered," Iskenderian said, "and because a woman might not have the same risk profile, that doesn't make her adverse, it makes her smart." Because they maintain their portfolio allocations — as opposed to frequent trading, which can stunt performance over time — women outperform men in the long run.…