Here's what investors can do to protect themselves as banking turmoil continues to ripple through markets, according to Barclays

• After SVB's collapse, fears of a wider financial crisis stoked a sell-off in regional bank stocks. 
• Barclays said defensive sectors helped mitigate losses and recommended investors stay with cash. 
• "Like many of our clients, we found ourselves sitting on the wrong side of the Banks trade this week." 

In a little more than a week, three US banks collapsed and a $30 billion rescue plan was created to save another lender, but sticking with cash and defensive stock sectors are solid options for investors as turmoil persists, Barclays said.