The case is one of two we decide today concerning the consequences to an apparent excess insurer of the insolvency of the underlying insurer. See Gulezian v. Lincoln Ins. Co., post 606 (1987).
In January, 1977, Irene Reilly allegedly sustained personal injuries as a result of a fall on premises owned by Roy Farr. The Reillys commenced a tort action against Farr in the Superior Court in Essex County. Farr had primary insurance covering the claim in the amount of $300,000 with Reserve Insurance Company (Reserve) and umbrella excess third-party liability insurance coverage (from $300,000 to $5,000,000) with Con*599tinental Casualty Company (Continental). In May, 1979, Reserve was declared insolvent and, pursuant to G. L. c. 175D (1984 ed.), the Massachusetts Insurers Insolvency Fund (Fund) took over the defense of the claim.
In this action, commenced in March, 1982, the Fund seeks a determination that it is not liable for any judgment in the Essex County tort case, that Continental will be liable to satisfy any judgment in that action, and that Continental is obliged to take over defense of that action. The case was submitted on cross motions for summary judgment. The Fund and Continental agree that, if Continental’s insurance policy provides first dollar coverage in the event of the insolvency of the primary insurer, Continental and not the Fund is obliged to satisfy any judgment in the tort action, up to the limits of Continental’s coverage.
The judge ordered the entry of a judgment in favor of the Fund which declared that the Fund is not liable for any judgment against Farr in the Essex County tort action and that Continental is so liable up to the limit of its coverage. He based his decision on what he concluded was ambiguous policy language which he ruled should be read in favor of the insured (and thus the Fund) to provide first dollar coverage by Continental. Continental appealed, and we allowed the Fund’s application for direct appellate review. We need not accept all the judge’s reasoning to conclude that the judgment should be affirmed.
The Continental policy in part provided as to its liability over primary coverage that it “will indemnify the insured for loss in excess of the total applicable limits of liability of underlying insurance stated in the schedule.” The schedule provided for underlying coverage for general liability, automobile liability, and employers’ liability insurance to various dollar limits of coverage.2
*600The Continental policy provides further that, if the underlying limit of liability has been “reduced,” the policy becomes excess of that reduced limit.3 Thus, if the underlying coverage is reduced to nothing, the excess policy in effect provides first dollar coverage. Was there at least an ambiguity as to whether the insolvency of the underlying insurer would cause the aggregate limit of the underlying insurance to be “reduced” ? The motion judge thought so, and we agree. The policy is ambiguous as to whether the excess insurer will step in when the underlying coverage becomes unavailable due to the primary insurer’s insolvency. On traditional analysis, such an ambiguity must be construed against the insurance company. See Cody v. Connecticut General Life Ins. Co., 387 Mass. 142, 146 (1982); August A. Busch & Co. of Mass., Inc. v. Liberty Mut. Ins. Co., 339 Mass. 239, 243 (1959), and cases cited.
In terms of what a reasonable insured might conclude looking at its insurance policy, a matter of a hypothetical insured’s reasonable expectations,4 the clearest fact is that the policy does not explicitly confront the consequences of the insolvency of the underlying insurer. An insurance company no doubt would view the amount of the underlying coverage as a kind of deductible amount assumed by the policyholder in all circumstances. On the other hand, if a reasonable policyholder thought about the subject at all, it probably would have assumed *601that the excess insurer would step into the void whenever, for whatever reason, the primary insurance company could not or would not meet its policy obligations. The result because of the ambiguity, or, if one prefers, because of the reasonable expectations of a policyholder looking at the policy, is that a reduction in the limit of the underlying coverage includes a reduction due to the financial failure of the primary insurer.
Continental argues that the reduction of the limit of the underlying coverage must refer only to a reduction due to payment of a loss or losses. Its excess policy required the insured to maintain the policies listed in the schedule of underlying insurance (or other policies no more restrictive) during the pendency of the policy “except for any reduction of the aggregate limits of liability in the underlying insurance because of injury or destruction.” In this policy language the cause of the reduction in the aggregate limits of liability is stated, namely, losses paid by the appropriate primary insurance. On the other hand, as noted above, when stating that the excess policy drops down to become excess of any reduced limit of liability, the policy does not restrict or define the causes of the reduction. The difference in the language concerning reduction of coverage is fatal to Continental’s argument.
A number of cases have held that, if an excess policy says it will drop down when there has been a reduction or exhaustion in the primary coverage due to the payment of losses, the excess policy does not drop down when the primary coverage is reduced or exhausted due to the insolvency of the primary insurer. See Mission Nat’l Ins. Co. v. Duke Transp. Co., 792 F.2d 550, 553 (5th Cir. 1986); Molina v. United States Fire Ins. Co., 574 F.2d 1176, 1178 (4th Cir. 1978); Prince Carpentry, Inc. v. Cosmopolitan Mut. Ins. Co., 124 Misc. 2d 919, 930 (N.Y. Sup. Ct. 1984); Guaranty Nat’l Ins. Co. v. Bayside Resort, Inc., 635 F. Supp. 1456, 1459 (D.V.I. 1986). The implication of these cases is that, as we hold, an excess policy that says without limitation that it drops down when the underlying coverage is reduced provides first dollar coverage when the primary insurer becomes insolvent and unable to make any payment on a claim. See Fageol Truck & Coach Co. v. Pacific *602Indent. Co., 18 Cal. 2d 748, 751-752 (1941) (coverage drops down on insolvency of primary insurer because primary coverage was “exhausted”).
Judgment affirmed.
We need not decide whether the motion judge was correct in concluding that the words “applicable limits of liability” were ambiguous and thus permitted the word “applicable” to mean “collectible” at the time of judgment. We do consider the question in the context of a different policy in Gulezian v. Lincoln Ins. Co., supra at 608-612.
If an excess policy provides that underlying coverage has to be collectible or recoverable at the time of judgment, the lower limit of the excess coverage *600drops down if the primary insurer becomes insolvent. See Reserve Ins. Co. v. Pisciotta, 30 Cal. 3d 800, 815 (1982); Donald B. MacNeal, Inc. v. Interstate Fire & Casualty Co., 132 Ill. App. 3d 564, 567-568 (1985); Gros v. Houston Fire & Casualty Ins. Co., 195 So. 2d 674, 676 (La. App. 1967).
The policy language is: “With respect to [excess liability indemnity], if the applicable limit of liability of the underlying insurance is less than as stated in the schedule of underlying insurance because the aggregate limit of liability of the underlying insurance has been reduced this policy becomes excess of such reduced limit of liability” (emphasis supplied).
We have taken note of the concept of an insured’s objectively reasonable expectations as a possible guide to the determination of an insured’s rights under an insurance policy. See Home Indem. Ins. Co. v. Merchants Distribs., Inc., 396 Mass. 103, 107 (1985), and cases cited. There is no need to rely on that concept in this case where the policy is conspicuously ambiguous.