Suppose the beta of stock $A$ is $0\mathrm{.}3.$

According to the video, this implies that the stock has

$\_$ volatility as the overall stock market.

Read the following passage of text and then answer the question that follows.

While the standard deviation of expected returns of a single stock can measure the risk of a single stock held in isolation, this measure of risk becomes less useful in the context of a portfolio of stocks. This is because most investors will hold large, diversified portfolios of stock $($a market portfolio$),$ thereby reducing risk until only the market risk remains. Thus, the relevant risk to consider is not the standard deviation of a stock's expected returns, but its influence on the portfolio's overall market risk.

To measure a stock's influence on market risk, as you learned in the previous video, a stock's beta is estimated. A stock's beta is a measurement of how a stock's price moves in tandem with the broader stock market. When adding a stock to a portfolio, the beta of the portfolio will change in accordance with the beta of the stock that was added. Adding a stock with a beta that is greater than that of the portfolio will increase the beta $($and risk$)$ of the portfolio. Likewise, adding a stock with a beta that is less than that of the portfolio will decrease the beta $($and risk$)$ of the portfolio.

Suppose you are adding a stock with a beta of $0\mathrm{.}4$ to a portfolio that presently has a beta of $1.$

After adding the stock to the portfolio, the beta of the portfolio will $q,,$ all else equal.