Sectors like oil, gas and coal accounted for 4% of Standard Bank's total lending and commitments in Dec. 2019, totalling around 67.4 billion rand ($4.85 billion).
"We're deeply committed to supporting inclusive and sustainable development," Tshabalala said in a statement.
"Traders may prefer to sit on their hands until after the SARB provides fresh insights into its assessment of prevailing economic conditions and prospective monetary policy."
The SARB has most likely reached the end of its lowering cycle and will start moving towards a hiking cycle, albeit only from next year onwards.
The slow vaccination roll-out programme, which raises the concern of a third wave of Covid-19 infections, and more intensive electricity outages remain the biggest downside risk to the economy over the short term.
"Today's FOMC meeting is perhaps the most crucial in the last six months," RMB analyst Nema Ramkhelawan-Bhana said in a note.
"For markets, the most important outcome relates to the Fed's view on rising treasury yields. It is the uncertainty surrounding these issues that has engendered mixed trade on international markets."