Which statement is true regarding a portfolio strategy?

A portfolio strategy is indeed a corporate-level strategy that aims to reduce risk across a collection of investments, including stocks, by diversifying the types of assets held. This approach helps companies manage risk by balancing their investments in various sectors, minimizing the impact of any single asset's poor performance on the overall portfolio. By diversifying, organizations can stabilize returns and enhance profitability in the long term, making this strategy an effective tool for risk management.

The other options do not accurately describe a portfolio strategy. For instance, the notion of improving how a company sells the same products pertains more to operational or marketing strategies rather than a portfolio approach. Similarly, measuring competitive behavior intensity among companies relates to competitive strategy and market dynamics, rather than the overarching risk-reducing focus of a portfolio strategy. Lastly, while turning around poor company performance through cost reductions might be a tactic used in turnaround strategies, it does not align with the essence of a portfolio strategy, which is primarily about diversification and risk management.