You can report half on each return, or your husband can report all of this on his. On your husband's, since it's being reported under his Social Security number, first report the entire amount on his return. For instance,in the case of Interest Income, enter all of the interest, then on the screen Tell us if any of these uncommon situations apply, check I need to adjust the taxable amount. Then enter the amount that you are reporting as a positive amount, and check I received all or part of this interest for someone else (I am a nominee). Do the same thing with Dividend Income.
There isn't a place to do that for stock sales. You could each report half of the proceeds, and save the information in case the IRS questions your husband (because it's reported as his), or follow this procedure from SuperUser bwa:
https://ttlc.intuit.com/replies/4849085
https://ttlc.intuit.com/replies/6110828
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