Simplemente vean la tabla adjunta de los valores que pertenecen al SPDR y vean que los que más ponderan están casi todos dentro del Dow Jones:
 
Company NameIndex WeightLastChange%Change
Johnson & Johnson9.53%99.35-0.43-0.43%
Pfizer Inc7.31%34.37-0.13-0.36%
Gilead Sciences Inc6.18%122.20-0.01-0.01%
Merck & Co Inc5.74%58.59-0.44-0.75%
Allergan plc4.45%311.28-1.04-0.33%
Amgen Inc4.23%161.08-0.61-0.38%
AbbVie Inc.4.15%70.35+0.33+0.47%
Unitedhealth Group Inc4.06%121.74-1.00-0.81%
Bristol-Myers Squibb3.88%67.02-0.31-0.46%
Medtronic plc3.78%76.10-0.51-0.67%
Biogen Inc3.45%413.00-3.26-0.78%
Celgene Corp3.29%119.96-0.38-0.32%
Lilly Eli & Co2.78%82.78+0.11+0.13%
Express Scripts Holding Co.2.40%90.59-0.23-0.25%
Abbott Laboratories2.17%49.54-0.34-0.68%
McKesson Corp1.93%233.70-1.84-0.78%
Thermo Fisher Scientific1.78%129.03-0.52-0.40%
Anthem Inc1.59%169.50-0.50-0.29%
Aetna Inc1.58%127.69-0.51-0.40%
Cigna Corporation1.51%164.56-0.19-0.12%
Alexion Pharmaceuticals Inc1.47%188.39-2.53-1.33%
Regeneron Pharmaceuticals Inc1.35%518.14-2.91-0.56%
Baxter Intl Inc1.34%71.07+0.40+0.57%
Vertex Pharmaceuticals Inc1.10%132.03+0.41+0.31%
Becton Dickinson & Co1.06%142.02-1.15-0.80%
Humana Inc1.05%187.58-2.28-1.20%
Cardinal Health Inc1.03%89.25+0.02+0.02%
Mylan NV1.01%70.81-0.22-0.30%
Stryker Corp1.01%96.30-0.32-0.33%
Perrigo Company plc0.95%189.46+0.07+0.04%
Zoetis Inc0.87%50.00-0.47-0.93%
Boston Scientific Corp0.84%17.91-0.04-0.22%
HCA Holdings Inc0.84%83.70-0.26-0.31%
AmerisourceBergen Corp0.83%110.88-0.93-0.83%
St Jude Medical Inc0.75%74.92-0.38-0.50%
Cerner Corp0.74%69.50-0.42-0.60%
Zimmer Holdings Inc0.67%112.29-0.39-0.35%
Intuitive Surgical Inc0.63%496.76+0.14+0.03%
Endo International plc0.59%83.54-0.39-0.46%
Edwards Lifesciences Corp0.54%143.68-0.95-0.66%
Hospira Inc0.53%88.56-0.01-0.01%
Mallinckrodt plc0.50%123.49-1.38-1.11%
DaVita HealthCare Partners Inc0.48%81.10-0.47-0.58%
Bard C.R. Inc0.47%172.82-0.15-0.09%
Agilent Technologies Inc0.45%39.36-0.24-0.61%
Universal Health Services B0.42%133.24-1.13-0.84%
Schein Henry Inc0.42%145.08-0.60-0.41%
Lab Corp of America Hldgs0.41%119.38-0.52-0.43%
Waters Corp0.39%134.79-0.44-0.33%
Quest Diagnostics0.37%72.00-0.10-0.14%
Varian Medical Systems Inc0.30%87.01-0.34-0.39%
Dentsply Intl0.26%52.68-0.35-0.66%
PerkinElmer Inc0.21%53.63-0.13-0.24%
Tenet Healthcare0.18%51.18-0.42-0.81%
Patterson Cos Inc0.15%49.09-0.18-0.37%