I'll offer a distinction. The dollar thresholds in the act apply to the net benefit provisions and do not apply to the national security provisions. Any dollar value investment can be examined under those provisions, so no change in the market valuation of any Canadian business would affect the national security review process at all.
As for the other provisions, if it's an investment by a state-owned enterprise, recall that it is reviewable over $428 million, based on asset value, and this is not revised off the books of the company. Even in the current circumstances, changes in asset values would not change the threshold in any real terms.
I mention this in reference to the concern that the honourable member has raised.