The sizzling stock rally is under threat, and company profits could shrink as consumers feel the squeeze, JPMorgan strategist says

• 2023's blistering stock rally is under threat, according to a top JPMorgan Asset Management strategist. 
• The impact of banking chaos could soon start to weigh on stocks, David Lebovitz said.
• Lebovitz added that waning consumer demand could also see companies profits get squeezed. 

The sizzling stock rally is under threat, and company profits could shrink as consumers feel the squeeze, according to a top strategist at JPMorgan's asset management arm.