A "visibly fatigued" US consumer is set to further weigh on share prices, potentially triggering another 8 per cent drop in the S & P 500, according to chief strategist at UBS Investment Bank. Bhanu Baweja said indicators such as employment expectations, spending outlook and consumer confidence were flashing warning signs. He expects the S & P 500 to fall as low as 5,300 as analysts cut their profit forecasts for the next three to four months.