The South African rand outperformed other BRICS currencies on Friday, climbing more than 1% against the U.S. dollar as investors moved back into riskier assets. The move came amid a broader improvement in market sentiment that helped support emerging-market currencies.

The currency's advance reflected a stronger appetite for growth-linked assets after recent caution in global markets. Traders appeared more willing to add exposure to developing-economy currencies, with the rand benefiting the most among its BRICS peers.

Analysts often view the rand as a bellwether for emerging-market sentiment because of its sensitivity to global risk trends, commodity prices and shifts in dollar demand. Friday's gains suggested that investors were once again looking beyond safe-haven trades.

Even so, currency markets remain vulnerable to swings in sentiment, especially when global economic data, interest-rate expectations or geopolitical tensions shift. The rand's rally may prove fragile if that renewed confidence fades.