On the stock market, the benchmark Top-40 index slipped 0.8% to 44,131 points while the broader All-Share index declined 0.7% to 51,146.
At 1540 GMT the rand had slipped 0.27% to R13.0450 per dollar, as investor jitters over Trump's fiscal plan again dominated sentiment and sapped the rand's recent momentum, pushing the unit to a third session of losses.
"In addition to Trump's speech, Fed policymakers Williams and Bullard are scheduled to speak; but like all of us, they and the dollar are at the mercy of Trumponomics," Rand Merchant Bank analyst Isaah Mhlanga said in a note.
