Complex sentence: Disciplined investment strategies say Marketwatch should be maintained in any eventuality, including taking advantage of available, favorable opportunities, such as: following a downturn in the market or the ability to remain steady in times of severe market fluctuations.
Split into simpler sentences: Disciplined investment strategies say Marketwatch should be maintained in any eventuality, including taking advantage of available, favorable opportunities, such as, following a downturn in the market. In addition, the ability to remain steady in times of severe market fluctuations.