Nah. If anything, the prospect of millions of dirt poor third worlders willing to live like dogs on our doorsteps & work for peanuts should have investors doing backflips.
On the other hand, the explosion of the welfare state which will surely result could have them a bit skittish.
Remember, however: "big business" BACKED Hawley-Smoot, expecting the same kinds of financial payoffs that you mention as possibly accompanying the immigration bill. And it was "big business" that paid the highest price.