Biden, who earlier last year signed into law a 1% tax on corporate stock buybacks, used his speech to call for that to be quadrupled, as well as renew his calls for higher taxes on billionaires.
If companies sense such a tax is imminent, it might spur them to speed up buybacks and eventually shift toward paying dividends instead.
"If this tax encourages companies to raise their dividends instead of buying back shares, all in all, it's not a bad thing."
Other topics were also watched by investors, particularly remarks on China, a key area of interest for investors.
BUYBACKS & BILLIONAIRESCorporate stock buybacks, where public companies buy back their own shares, thereby juicing the price of the shares as a way to return cash to shareholders, have grabbed headlines this year.