Fears remained on Wall Street on Monday despite the measures announced over the weekend following the collapse of California-based Silicon Valley Bank (SIVB.O) and New York-based Signature Bank (SBNY.O). Some investors have called for further action by banking regulators to reassure markets. But banking experts said regulators would likely want to see the extent of any further contagion before deciding on fresh measures. In addition, the Fed announced Monday it was doing an internal review of its oversight of Silicon Valley Bank, where it was the primary regulator. Prior to Silicon Valley Bank's collapse, banks had been lobbying lawmakers to push back against the Fed's review, arguing it could slow the economy.

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