The Q1 earnings season is going full throttle with over 180 companies on the S&P 500 index reporting this week. Taking into consideration the 132 companies that have reported results till Friday (Apr 22), the earnings trend has more or less confirmed the grim projections for the quarter. Based on results already declared, Q1 is widely expected to be the fourth consecutive quarter to report an earnings decline for the benchmark index.Plagued by a plethora of macroeconomic issues and continued volatility in the equity market, Q1 earnings estimates for the S&P 500 index have gone downhill over the last three months, albeit improving slightly in the last few days. Per the latest Earnings Trend Report, overall Q1 earnings for the S&P 500 companies are expected to be down 9.4% on a 0.8% decline in revenues. Guidance for most companies that have reported so far was lowered to easy-to-beat levels, resulting in positive earnings and revenue surprises.However, the overall Q1 earnings scenario still remains clouded with uncertainty. What is more alarming is that the likely dismal earnings performance is not attributable to the inherent weakness of the Energy sector alone. Rather, downward estimate revisions are expected in almost all the sectors, barring a few. About 9 of the 16 sectors are expected to witness an earnings decline in the quarter under review, with Oil/Energy, Basic Materials, Industrial Products, Aerospace, and Conglomerates being the most notable.Among the Protection stocks slated to report this week, let’s have a sneak peek at two major security services providers to see how things are shaping up for the upcoming quarterly results.Tyco International plc TYC is scheduled to report second-quarter fiscal 2016 results before the opening bell on Apr 29. During the quarter, Tyco signed a merger deal with the global diversified technology firm, Johnson Controls Inc. JCI. Per the deal, Tyco will own 44% equity in the joint company. Post merger, the companies plan to strengthen their building products and technology, integrated solutions and energy storage portfolios. Tyco believes that this acquisition will help it to expand its global footprint in the building-technology market, enhance shareholder value and launch innovative solutions. For the impending quarter, Tyco has an Earnings ESP of 0.00% with a Zacks Rank #3 (Hold) (read more: Will Tyco Q2 Earnings Surprise on Portfolio Reshuffle?).Allegion Plc ALLE will report first-quarter 2016 results before the opening bell on Apr 28. Allegion is likely to benefit from strategic acquisitions, collaborations and investment in new technology, as demand for electronic security products is steadily improving. The Sep 2015 acquisitions of Axa Stenman, a European residential and portable security provider, and SimonsVoss, a leading lock manufacturer based in Europe, should boost revenues from the continent. Moreover, the company’s takeover of a South Korea-based producer of innovative electronic door locks, Milre Systek Co., Ltd, last year, will continue to add to its top line. For the first quarter of 2016, this Zacks Rank #3 stock has an Earnings ESP of 0.00% (read more: Allegion Q1 Earnings: Can the Stock Pull a Surprise?).Stay tuned! Check later on our full write-up on earnings releases of these stocks.Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report JOHNSON CONTROL (JCI): Free Stock Analysis Report TYCO INTL PLC (TYC): Free Stock Analysis Report ALLEGION PLC (ALLE): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research