If the US does what they should, they should completely blockade Russia from any access to the West, including SWIFT blockade, trade embargo, complete visa revocation, etc. This is not that useful (sp not compared to doing it 10 years ago) but still helps to reduce Putin's ability to keep waging war as it cripples Russia's economy.

BUT that of course has a cost to the West. Less business, risk of recession, risk of stagflation, etc. and that definitely tanks the economy. Until yday Bloomberg estimated the SP500 was trading at a 10% discount due to war concerns (my take is only ~5%) and overnight it has fallen only 2%, so I don't think a 2% fall over the largest war Europe has seen since WW2 is particularly large.