When a company's core products are under attack, revenues declines and expenses increase. Declining core products are a bad sign for management, because they can not invest to expand in to other markets. Plus, if the core products are losing revenue, then the business might not have the cash flow to invest into other markets. … "Declining Core Products And Revenue Streams" has a significant impact, so an analyst should put more weight into it. "Declining Core Products And Revenue Streams" will have a long-term negative impact on this entity, which subtracts from the entity's value.