Why on Earth have their profits plunged??? Perfect Modal Verbs / Third Conditional for Speculation

This week we've been using perfect modal verbs again but this time we've been speculating about business and companies.....

Imagine you saw a graph for company profits like this:-

PROFITS

YEAR 1 / YEAR 2 / YEAR 3 /  YEAR 4

Let's try to use the following structures to speculate about what could have caused this plunge / plummet (caída en picado):-

There might have been bad press for the company's products.

The company owner must have had financial problems.

The company would have gone bankrupt in year 5 if the profits had kept plunging.

PERFECT MODAL VERBS:-

SB + MODAL VERB + AUX. HAVE + PAST PARTICIPLE

e.g. There could have been a problem with company's shares on the stock market. (Impersonal SB)

OR

Mrs Black (the CEO) might have resigned. (Personal SB)

THE THIRD CONDITIONAL

IF + SB + HAD + PAST PART., SB + MODAL VERB + HAVE + PAST PARTICIPLE

OR

SB + MODAL VERB + HAVE + PAST PARTICIPLE IF SB + HAD + PAST PARTICIPLE

e.g. If the profits had carried on growing like in year two, the company would have been in a fantastic position nowadays.

Feel free to leave your own examples in the comments!